81331720496

Names of 81331720496

• Cardinal: 81331720496 can be written as Eighty-one billion, three hundred thirty-one million, seven hundred twenty thousand, four hundred ninety-six.

Scientific notation

• Scientific notation: 8.1331720496 × 10¹⁰

Factors of 81331720496

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 352

Divisors of 81331720496

• Number of divisors d(n): 180
• Complete list of divisors:
  1 2 4 8 13 16 26 37 52 74 104 127 148 169 173 208 254 296 338 346 481 508 592 676 692 962 1016 1352 1369 1384 1651 1924 2032 2249 2704 2738 2768 3302 3848 4498 4699 5476 6253 6401 6604 7696 8996 9398 10952 12506 12802 13208 17797 17992 18796 21463 21904 21971 25012 25604 26416 29237 35594 35984 37592 42926 43942 50024 51208 58474 61087 71188 75184 83213 85852 87884 100048 102416 116948 122174 142376 166426 171704 173863 175768 231361 233896 236837 244348 284752 285623 332852 343408 347726 351536 462722 467792 473674 488696 571246 665704 695452 794131 812927 925444 947348 977392 1081769 1142492 1331408 1390904 1588262 1625854 1850888 1894696 2163538 2260219 2284984 2781808 3078881 3176524 3251708 3701776 3713099 3789392 4327076 4520438 4569968 6157762 6353048 6503416 7426198 8654152 9040876 10568051 12315524 12706096 13006832 14852396 17308304 18081752 21136102 24631048 29382847 29704792 30078299 36163504 40025453 42272204 49262096 58765694 59409584 60156598 80050906 84544408 117531388 120313196 137384663 160101812 169088816 235062776 240626392 274769326 320203624 391017887 470125552 481252784 549538652 640407248 782035774 1099077304 1564071548 2198154608 3128143096 5083232531 6256286192 10166465062 20332930124 40665860248 81331720496
• Sum of all divisors σ(n): 177773121792
• Sum of proper divisors (its aliquot sum) s(n): 96441401296
• 81331720496 is an abundant number, because the sum of its proper divisors (96441401296) is greater than itself. Its abundance is 15109680800

Bases of 81331720496

• Binary: 1001011101111101111111001000100110000₂
• Hexadecimal: 0x12EFBF9130
• Base-36: 11D2T168

Squares and roots of 81331720496

• 81331720496 squared (81331720496²) is 6614848758839466486016
• 81331720496 cubed (81331720496³) is 537997030377243997574412604583936
• The square root of 81331720496 is 285187.1674812877
• The cube root of 81331720496 is 4332.6471322319

Scales and comparisons

• 81,331,720,496 seconds is equal to 2,586 years, 5 weeks, 8 hours, 34 minutes, 56 seconds.
• To count from 1 to 81,331,720,496 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 81331720496 cubic inches would be around 361.1 feet tall.

Recreational maths with 81331720496

• 81331720496 backwards is 69402713318
• The number of decimal digits it has is: 11
• The sum of 81331720496's digits is 44
• More coming soon!