| Nominal | 16491 |
| Cardinal | sixteen thousand four hundred ninety-one |
Cardinal sixteen thousand four hundred ninety-one | |
| Ordinal | 16,491st |
| Number of digits | 5 |
| Sum of digits | 21 |
| Product of digits | 216 |
| Number parity | Odd |
| Prime factorization | 3 x 23 x 239 |
| Prime factors | 3, 23, 239 |
| Number of distinct prime factors ω(n) | 3 |
| Total number of prime factors Ω(n) | 3 |
| Sum of prime factors | 265 |
| Product of prime factors | 16491 |
| Is 16491 a prime number? | No |
| Is 16491 a semiprime number? | No |
| Is 16491 a Chen prime number? | No |
| Is 16491 a Mersenne prime number? | No |
| Is 16491 a Catalan number? | No |
| Is 16491 a Fibonacci number? | No |
| Is 16491 a Idoneal number? | No |
| Square of 16491 (n2) | 271953081 |
| Cube of 16491 (n3) | 4484778258771 |
| Square root of 16491 | 128.41728855571 |
| Natural Logarithm (ln) of 16491 | 9.7105700565288 |
| Decimal Logarithm (log) of 16491 | 4.2172469916854 |
| Sine of 16491 | -0.70339408550494 |
| Cosecant of 16491 | -1.42167814687 |
| Cosine of 16491 | -0.71080008474723 |
| Secant of 16491 | -1.4068653359202 |
| Tangent of 16491 | 0.98958075638817 |
| Cotangent of 16491 | 1.0105289472785 |
| The spelling of 16491 in words is "sixteen thousand four hundred ninety-one", meaning that: |
| 16491 is not an aban number (as it contains the letter a) |
| 16491 is not an eban number (as it contains the letter e) |
| 16491 is not an iban number (as it contains the letter i) |
| 16491 is not an oban number (as it contains the letter o) |
| 16491 is not a tban number (as it contains the letter t) |
| 16491 is not an uban number (as it contains the letter u) |
| Bengali numerals | ১৬৪৯১ |
| Eastern Arabic numerals | ١٦٬٤٩١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓆼𓆼𓆼𓆼𓆼𓆼𓍥𓎎𓏺 |
| Khmer numerals | ១៦៤៩១ |
| Japanese numerals | 一万六千四百九十一 |
| Roman numerals | n/a |
| Thai numerals | ๑๖๔๙๑ |
| Arabic | ستة عشر ألف و أربعة مائة و واحد و تسعون |
| Croatian | šesnaest tisuća četiristo devedeset i jedan |
| Czech | šestnáct tisíc čtyři sta devadesát jeden |
| Danish | seksten tusinde fire hundrede en og halvfems |
| Dutch | zestienduizend vierhonderdéénennegentig |
| Estonian | akpe wuiade alafa ene blaasieke vɔ ɖekɛ |
| Faroese | sekstan tusin og fýrehundraðognítiein |
| Filipino | labíng-anim na libó’t ápat na daán at siyám na pû’t isá |
| Finnish | kuusitoistatuhattaneljäsataayhdeksänkymmentäyksi |
| French | seize mille quatre cent quatre-vingt-onze |
| Greek | δεκαέξι χίλιάδες τετρακόσια εννενήντα ένα |
| German | sechzehntausendvierhunderteinundneunzig |
| Hebrew | שישה עשר אלף ארבע מאות תשעים ואחת |
| Hindi | सोलह हज़ार चार सौ इक्यानबे |
| Hungarian | tizenhatezernégyszázkilencvenegy |
| Icelandic | sextán þúsund og fjögurhundrað og níutíu og einn |
| Indonesian | enam belas ribu empat ratus sembilan puluh satu |
| Italian | sedicimilaquattrocentonovantuno |
| Japanese | 一万六千四百九十一 |
| Korean | 만 육천사백구십일 |
| Latvian | sešpadsmit tūkstoši četrsimt deviņdesmit viens |
| Lithuanian | šešiolika tūkstančių keturi šimtai devyniasdešimt vienas |
| Norwegian | seksten tusen fire hundre og nittién |
| Persian | شانزده هزار و چهارصد و نود و یک |
| Polish | szesnaście tysięcy czterysta dziewięćdziesiąt jeden |
| Portuguese | dezesseis mil quatrocentos e noventa e um |
| Romanian | şasesprezece mii patru sute nouăzeci şi unu |
| Russian | шестнадцать тысяч четыреста девяносто один |
| Serbian | шеснаест хиљада четиристо деведесет и један |
| Slovak | šestnásť tisíc štyristo deväťdesiatjeden |
| Slovene | šestnajst tisuću štiristo devetdeset ena |
| Spanish | dieciseis mil cuatrocientos noventa y uno |
| Swahili | elfu kumi na sita, mia nne na tisini na moja |
| Swedish | sextontusenfyrahundranittioen |
| Thai | หนึ่งหมื่นหกพันสี่ร้อยเก้าสิบเอ็ด |
| Turkish | on altı bin dört yüz doksan bir |
| Ukrainian | шістнадцять тисяч чотириста девʼяносто один |
| Vietnamese | mười sáu nghìn bốn trăm chín mươi mốt |
| Number 16491 reversed | 19461 | |
| Unicode Character | U+406B | 䁫 |
| Unix Timestamp | Thu, 01 Jan 1970 04:34:51 +0000 | |