81077997

Names of 81077997

• Cardinal: 81077997 can be written as Eighty-one million, seventy-seven thousand, nine hundred ninety-seven.

Scientific notation

• Scientific notation: 8.1077997 × 10⁷

Factors of 81077997

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 82

Divisors of 81077997

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 7 11 13 19 21 29 33 39 49 57 77 87 91 133 143 147 203 209 231 247 273 319 343 377 399 429 539 551 609 627 637 741 931 957 1001 1029 1131 1421 1463 1617 1653 1729 1911 2233 2639 2717 2793 3003 3773 3857 4147 4263 4389 4459 5187 6061 6517 6699 7007 7163 7917 8151 9947 10241 11319 11571 12103 12441 13377 15631 18183 18473 19019 19551 21021 21489 26999 29029 29841 30723 36309 42427 46893 49049 50141 55419 57057 71687 78793 80997 84721 87087 109417 127281 129311 133133 147147 150423 188993 203203 215061 236379 254163 296989 328251 350987 387933 399399 551551 566979 609609 890967 931931 1052961 1422421 1654653 2078923 2456909 2795793 3860857 4267263 6236769 7370727 11582571 27025999 81077997
• Sum of all divisors σ(n): 161280000
• Sum of proper divisors (its aliquot sum) s(n): 80202003
• 81077997 is a deficient number, because the sum of its proper divisors (80202003) is less than itself. Its deficiency is 875994

Bases of 81077997

• Binary: 100110101010010011011101101₂
• Hexadecimal: 0x4D526ED
• Base-36: 1C9S6L

Squares and roots of 81077997

• 81077997 squared (81077997²) is 6573641597532009
• 81077997 cubed (81077997³) is 532977693723775433105973
• The square root of 81077997 is 9004.3321240389
• The cube root of 81077997 is 432.8137044899

Scales and comparisons

• 81,077,997 seconds is equal to 2 years, 30 weeks, 9 hours, 39 minutes, 57 seconds.
• To count from 1 to 81,077,997 would take you about three 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 81077997 cubic inches would be around 36.1 feet tall.

Recreational maths with 81077997

• 81077997 backwards is 79977018
• The number of decimal digits it has is: 8
• The sum of 81077997's digits is 48
• More coming soon!