81188998912

Names of 81188998912

• Cardinal: 81188998912 can be written as Eighty-one billion, one hundred eighty-eight million, nine hundred ninety-eight thousand, nine hundred twelve.

Scientific notation

• Scientific notation: 8.1188998912 × 10¹⁰

Factors of 81188998912

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 189

Divisors of 81188998912

• Number of divisors d(n): 162
• Complete list of divisors:
  1 2 4 7 8 14 16 28 32 53 56 64 106 112 127 128 212 224 254 256 371 424 448 508 742 848 889 896 1016 1484 1696 1778 1792 2032 2809 2968 3392 3556 4064 5618 5936 6731 6784 7112 8128 11236 11872 13462 13568 14224 16129 16256 19663 22472 23744 26924 28448 32258 32512 39326 44944 47117 47488 53848 56896 64516 78652 89888 94234 94976 107696 112903 113792 129032 157304 179776 188468 215392 225806 227584 258064 314608 356743 359552 376936 430784 451612 516128 629216 713486 719104 753872 854837 861568 903224 1032256 1258432 1426972 1507744 1709674 1723136 1806448 2064512 2497201 2516864 2853944 3015488 3419348 3612896 4129024 4994402 5033728 5707888 5983859 6030976 6838696 7225792 9988804 11415776 11967718 12061952 13677392 14451584 19977608 22831552 23935436 27354784 28903168 39955216 45306361 45663104 47870872 54709568 79910432 90612722 91326208 95741744 109419136 159820864 181225444 191483488 218838272 317144527 319641728 362450888 382966976 634289054 639283456 724901776 765933952 1268578108 1449803552 1531867904 2537156216 2899607104 5074312432 5799214208 10148624864 11598428416 20297249728 40594499456 81188998912
• Sum of all divisors σ(n): 190271017608
• Sum of proper divisors (its aliquot sum) s(n): 109082018696
• 81188998912 is an abundant number, because the sum of its proper divisors (109082018696) is greater than itself. Its abundance is 27893019784

Bases of 81188998912

• Binary: 1001011100111001111011100111100000000₂
• Hexadecimal: 0x12E73DCF00
• Base-36: 11APU0HS

Squares and roots of 81188998912

• 81188998912 squared (81188998912²) is 6591653544332737183744
• 81188998912 cubed (81188998912³) is 535169752439111542976973560086528
• The square root of 81188998912 is 284936.8331964121
• The cube root of 81188998912 is 4330.1113265491

Scales and comparisons

• 81,188,998,912 seconds is equal to 2,581 years, 29 weeks, 11 hours, 41 minutes, 52 seconds.
• To count from 1 to 81,188,998,912 would take you about five thousand, one hundred sixty-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 81188998912 cubic inches would be around 360.8 feet tall.

Recreational maths with 81188998912

• 81188998912 backwards is 21989988118
• 81188998912 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81188998912's digits is 64
• More coming soon!