81490111021616843

Names of 81490111021616843

• Cardinal: 81490111021616843 can be written as Eighty-one quadrillion, four hundred ninety trillion, one hundred eleven billion, twenty-one million, six hundred sixteen thousand, eight hundred forty-three.

Scientific notation

• Scientific notation: 8.1490111021616843 × 10¹⁶

Factors of 81490111021616843

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 90778852

Divisors of 81490111021616843

• Number of divisors d(n): 64
• Complete list of divisors:
  1 7 13 89 91 271 409 623 1157 1897 2863 3523 5317 8099 24119 24661 36401 37219 110839 168833 254807 313547 473213 775873 1440907 2194829 3312491 9864671 10086349 69052697 90778063 128240723 635446441 897685061 1180114819 8079247607 8260803733 24600855073 37128227767 56554733249 105030218891 172205985511 259897594369 319811115949 482666960971 735211532237 2189476101497 2238677811643 3304412271263 3378668726797 10061749724857 15326332710479 23130885898841 28463189319461 42957359526419 70432248073999 130802746423141 199242325236227 300701516684933 895495725512273 915619224961987 6268470078585911 11641444431659549 81490111021616843
• Sum of all divisors σ(n): 102045582548582400
• Sum of proper divisors (its aliquot sum) s(n): 20555471526965557
• 81490111021616843 is a deficient number, because the sum of its proper divisors (20555471526965557) is less than itself. Its deficiency is 60934639494651286

Bases of 81490111021616843

• Binary: 100100001100000101101001100000000001001101000111011001011₂
• Hexadecimal: 0x12182D300268ECB
• Base-36: MADU06XYCWB

Squares and roots of 81490111021616843

• 81490111021616843 squared (81490111021616843²) is 6640638194315438871546433901286649
• 81490111021616843 cubed (81490111021616843³) is 541146343709154315922353974832328498682029989429107
• The square root of 81490111021616843 is 285464728.1567669315
• The cube root of 81490111021616843 is 433545.7865245603

Scales and comparisons

• 81,490,111,021,616,843 seconds is equal to 2,591,133,465 years, 1 week, 1 day, 17 hours, 7 minutes, 23 seconds.
• To count from 1 to 81,490,111,021,616,843 would take you about seven billion, seven hundred seventy-three million, four hundred thousand, three hundred ninety-five years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 81490111021616843 cubic inches would be around 36128.8 feet tall.

Recreational maths with 81490111021616843

• 81490111021616843 backwards is 34861612011109418
• The number of decimal digits it has is: 17
• The sum of 81490111021616843's digits is 56
• More coming soon!