81335361072

Names of 81335361072

• Cardinal: 81335361072 can be written as Eighty-one billion, three hundred thirty-five million, three hundred sixty-one thousand and seventy-two.

Scientific notation

• Scientific notation: 8.1335361072 × 10¹⁰

Factors of 81335361072

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 82574

Divisors of 81335361072

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 21 24 28 42 48 49 56 84 98 112 147 168 196 294 336 392 421 588 784 842 1176 1263 1684 2352 2526 2947 3368 5052 5894 6736 8841 10104 11788 17682 20208 20629 23576 35364 41258 47152 61887 70728 82141 82516 123774 141456 164282 165032 246423 247548 328564 330064 492846 495096 574987 657128 985692 990192 1149974 1314256 1724961 1971384 2299948 3449922 3942768 4024909 4599896 6899844 8049818 9199792 12074727 13799688 16099636 24149454 27599376 32199272 34581361 48298908 64398544 69162722 96597816 103744083 138325444 193195632 207488166 242069527 276650888 414976332 484139054 553301776 726208581 829952664 968278108 1452417162 1659905328 1694486689 1936556216 2904834324 3388973378 3873112432 5083460067 5809668648 6777946756 10166920134 11619337296 13555893512 20333840268 27111787024 40667680536 81335361072
• Sum of all divisors σ(n): 245004614832
• Sum of proper divisors (its aliquot sum) s(n): 163669253760
• 81335361072 is an abundant number, because the sum of its proper divisors (163669253760) is greater than itself. Its abundance is 82333892688

Bases of 81335361072

• Binary: 1001011101111111101110001111000110000₂
• Hexadecimal: 0x12EFF71E30
• Base-36: 11D4Z29C

Squares and roots of 81335361072

• 81335361072 squared (81335361072²) is 6615440960712612989184
• 81335361072 cubed (81335361072³) is 538069279190058943899877870645248
• The square root of 81335361072 is 285193.5501935485
• The cube root of 81335361072 is 4332.7117773491

Scales and comparisons

• 81,335,361,072 seconds is equal to 2,586 years, 11 weeks, 11 hours, 51 minutes, 12 seconds.
• To count from 1 to 81,335,361,072 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 81335361072 cubic inches would be around 361.1 feet tall.

Recreational maths with 81335361072

• 81335361072 backwards is 27016353318
• The number of decimal digits it has is: 11
• The sum of 81335361072's digits is 39
• More coming soon!