81331042368

Names of 81331042368

• Cardinal: 81331042368 can be written as Eighty-one billion, three hundred thirty-one million, forty-two thousand, three hundred sixty-eight.

Scientific notation

• Scientific notation: 8.1331042368 × 10¹⁰

Factors of 81331042368

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 3886345

Divisors of 81331042368

• Number of divisors d(n): 56
• Complete list of divisors:
  1 2 3 4 6 8 12 16 24 32 48 64 96 109 192 218 327 436 654 872 1308 1744 2616 3488 5232 6976 10464 20928 3886231 7772462 11658693 15544924 23317386 31089848 46634772 62179696 93269544 124359392 186539088 248718784 373078176 423599179 746156352 847198358 1270797537 1694396716 2541595074 3388793432 5083190148 6777586864 10166380296 13555173728 20332760592 27110347456 40665521184 81331042368
• Sum of all divisors σ(n): 217162644160
• Sum of proper divisors (its aliquot sum) s(n): 135831601792
• 81331042368 is an abundant number, because the sum of its proper divisors (135831601792) is greater than itself. Its abundance is 54500559424

Bases of 81331042368

• Binary: 1001011101111101101010011100001000000₂
• Hexadecimal: 0x12EFB53840
• Base-36: 11D2EHXC

Squares and roots of 81331042368

• 81331042368 squared (81331042368²) is 6614738452665411047424
• 81331042368 cubed (81331042368³) is 537983573346969308426176601260032
• The square root of 81331042368 is 285185.9785613591
• The cube root of 81331042368 is 4332.6350906099

Scales and comparisons

• 81,331,042,368 seconds is equal to 2,586 years, 3 weeks, 6 days, 12 hours, 12 minutes, 48 seconds.
• To count from 1 to 81,331,042,368 would take you about five thousand, one hundred seventy-two 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 81331042368 cubic inches would be around 361.1 feet tall.

Recreational maths with 81331042368

• 81331042368 backwards is 86324013318
• The number of decimal digits it has is: 11
• The sum of 81331042368's digits is 39
• More coming soon!