81591197376

Names of 81591197376

• Cardinal: 81591197376 can be written as Eighty-one billion, five hundred ninety-one million, one hundred ninety-seven thousand, three hundred seventy-six.

Scientific notation

• Scientific notation: 8.1591197376 × 10¹⁰

Factors of 81591197376

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 1089

Divisors of 81591197376

• Number of divisors d(n): 224
• Complete list of divisors:
  1 2 3 4 6 8 12 13 16 24 26 32 39 48 52 64 78 96 104 156 181 192 208 312 313 362 416 543 577 624 626 724 832 939 1086 1154 1248 1252 1448 1731 1878 2172 2308 2353 2496 2504 2896 3462 3756 4069 4344 4616 4706 5008 5792 6924 7059 7501 7512 8138 8688 9232 9412 10016 11584 12207 13848 14118 15002 15024 16276 17376 18464 18824 20032 22503 24414 27696 28236 30004 30048 32552 34752 36928 37648 45006 48828 55392 56472 56653 60008 60096 65104 75296 90012 97656 104437 110784 112944 113306 120016 130208 150592 169959 180024 180601 195312 208874 225888 226612 240032 260416 313311 339918 360048 361202 390624 417748 451776 453224 480064 541803 626622 679836 720096 722404 736489 781248 835496 906448 1083606 1253244 1357681 1359672 1440192 1444808 1472978 1670992 1812896 2167212 2209467 2347813 2506488 2715362 2719344 2889616 2945956 3341984 3625792 4073043 4334424 4418934 4695626 5012976 5430724 5438688 5779232 5891912 6683968 7043439 8146086 8668848 8837868 9391252 10025952 10861448 10877376 11558464 11783824 14086878 16292172 17337696 17675736 18782504 20051904 21722896 23567648 28173756 32584344 32688781 34675392 35351472 37565008 43445792 47135296 56347512 65168688 65377562 70702944 75130016 86891584 98066343 112695024 130337376 130755124 141405888 150260032 196132686 225390048 260674752 261510248 392265372 424954153 450780096 523020496 784530744 849908306 1046040992 1274862459 1569061488 1699816612 2092081984 2549724918 3138122976 3399633224 5099449836 6276245952 6799266448 10198899672 13598532896 20397799344 27197065792 40795598688 81591197376
• Sum of all divisors σ(n): 234920340928
• Sum of proper divisors (its aliquot sum) s(n): 153329143552
• 81591197376 is an abundant number, because the sum of its proper divisors (153329143552) is greater than itself. Its abundance is 71737946176

Bases of 81591197376

• Binary: 1001011111111001101101101111011000000₂
• Hexadecimal: 0x12FF36DEC0
• Base-36: 11HDAITC

Squares and roots of 81591197376

• 81591197376 squared (81591197376²) is 6657123489249389285376
• 81591197376 cubed (81591197376³) is 543162676567752735270572806373376
• The square root of 81591197376 is 285641.7290523217
• The cube root of 81591197376 is 4337.2497985841

Scales and comparisons

• 81,591,197,376 seconds is equal to 2,594 years, 18 weeks, 13 hours, 29 minutes, 36 seconds.
• To count from 1 to 81,591,197,376 would take you about five thousand, one hundred eighty-eight 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 81591197376 cubic inches would be around 361.4 feet tall.

Recreational maths with 81591197376

• 81591197376 backwards is 67379119518
• The number of decimal digits it has is: 11
• The sum of 81591197376's digits is 57
• More coming soon!