81200389566720

Names of 81200389566720

• Cardinal: 81200389566720 can be written as Eighty-one trillion, two hundred billion, three hundred eighty-nine million, five hundred sixty-six thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 8.120038956672 × 10¹³

Factors of 81200389566720

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 21145934793

Divisors of 81200389566720

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 64 80 96 120 128 160 192 240 256 320 384 480 640 768 960 1280 1920 3840 21145934783 42291869566 63437804349 84583739132 105729673915 126875608698 169167478264 211459347830 253751217396 317189021745 338334956528 422918695660 507502434792 634378043490 676669913056 845837391320 1015004869584 1268756086980 1353339826112 1691674782640 2030009739168 2537512173960 2706679652224 3383349565280 4060019478336 5075024347920 5413359304448 6766699130560 8120038956672 10150048695840 13533398261120 16240077913344 20300097391680 27066796522240 40600194783360 81200389566720
• Sum of all divisors σ(n): 259333744190976
• Sum of proper divisors (its aliquot sum) s(n): 178133354624256
• 81200389566720 is an abundant number, because the sum of its proper divisors (178133354624256) is greater than itself. Its abundance is 96932965057536

Bases of 81200389566720

• Binary: 10010011101100111110000011000000011000100000000₂
• Hexadecimal: 0x49D9F0603100
• Base-36: SS6XZEZ9C

Squares and roots of 81200389566720

• 81200389566720 squared (81200389566720²) is 6593503265787090229331558400
• 81200389566720 cubed (81200389566720³) is 535395033791352288586681526822998376448000
• The square root of 81200389566720 is 9011125.8767548021
• The cube root of 81200389566720 is 43303.1381907565

Scales and comparisons

• 81,200,389,566,720 seconds is equal to 2,581,921 years, 11 weeks, 2 days, 16 hours, 32 minutes.
• To count from 1 to 81,200,389,566,720 would take you about six million, four hundred fifty-four thousand, eight hundred 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 81200389566720 cubic inches would be around 3608.6 feet tall.

Recreational maths with 81200389566720

• 81200389566720 backwards is 02766598300218
• The number of decimal digits it has is: 14
• The sum of 81200389566720's digits is 57
• More coming soon!