81377508231272890

Names of 81377508231272890

• Cardinal: 81377508231272890 can be written as Eighty-one quadrillion, three hundred seventy-seven trillion, five hundred eight billion, two hundred thirty-one million, two hundred seventy-two thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 8.137750823127289 × 10¹⁶

Factors of 81377508231272890

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 991340

Divisors of 81377508231272890

• Number of divisors d(n): 108
• Complete list of divisors:
  1 2 5 7 10 13 14 26 35 49 65 70 91 98 130 169 182 245 338 455 490 637 845 910 1183 1274 1690 2366 3185 5915 6370 8281 11830 16562 41405 82810 991313 1982626 4956565 6939191 9913130 12887069 13878382 25774138 34695955 48574337 64435345 69391910 90209483 97148674 128870690 167531897 180418966 242871685 335063794 451047415 485743370 631466381 837659485 902094830 1172723279 1262932762 1675318970 2345446558 3157331905 5863616395 6314663810 8209062953 11727232790 16418125906 41045314765 82090629530 982701463969 1965402927938 4913507319845 6878910247783 9827014639690 12775119031597 13757820495566 25550238063194 34394551238915 48152371734481 63875595157985 68789102477830 89425833221179 96304743468962 127751190315970 166076547410761 178851666442358 240761858672405 332153094821522 447129166105895 481523717344810 625980832548253 830382737053805 894258332211790 1162535831875327 1251961665096506 1660765474107610 2325071663750654 3129904162741265 5812679159376635 6259808325482530 8137750823127289 11625358318753270 16275501646254578 40688754115636445 81377508231272890
• Sum of all divisors σ(n): 184510247599025514
• Sum of proper divisors (its aliquot sum) s(n): 103132739367752624
• 81377508231272890 is an abundant number, because the sum of its proper divisors (103132739367752624) is greater than itself. Its abundance is 21755231136479734

Bases of 81377508231272890

• Binary: 100100001000111000110100110011110110101001101100110111010₂
• Hexadecimal: 0x1211C699ED4D9BA
• Base-36: M99X36NWGCA

Squares and roots of 81377508231272890

• 81377508231272890 squared (81377508231272890²) is 6622298845930886965803389648952100
• 81377508231272890 cubed (81377508231272890³) is 538906178844689714048862036429397805276037638569000
• The square root of 81377508231272890 is 285267432.8262391925
• The cube root of 81377508231272890 is 433346.0037218543

Scales and comparisons

• 81,377,508,231,272,890 seconds is equal to 2,587,553,044 years, 30 weeks, 6 days, 7 hours, 48 minutes, 10 seconds.
• To count from 1 to 81,377,508,231,272,890 would take you about seven billion, seven hundred sixty-two million, six hundred fifty-nine thousand, one hundred thirty-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 81377508231272890 cubic inches would be around 36112.2 feet tall.

Recreational maths with 81377508231272890

• 81377508231272890 backwards is 09827213280577318
• The number of decimal digits it has is: 17
• The sum of 81377508231272890's digits is 73
• More coming soon!