81516144080

Names of 81516144080

• Cardinal: 81516144080 can be written as Eighty-one billion, five hundred sixteen million, one hundred forty-four thousand and eighty.

Scientific notation

• Scientific notation: 8.151614408 × 10¹⁰

Factors of 81516144080

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 19831

Divisors of 81516144080

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 28 29 35 40 56 58 70 80 112 116 140 145 203 232 257 280 290 406 464 514 560 580 812 1015 1028 1160 1285 1624 1799 2030 2056 2320 2570 3248 3598 4060 4112 5140 7196 7453 8120 8995 10280 14392 14906 16240 17990 19531 20560 28784 29812 35980 37265 39062 52171 59624 71960 74530 78124 97655 104342 119248 136717 143920 149060 156248 195310 208684 260855 273434 298120 312496 390620 417368 521710 546868 566399 596240 683585 781240 834736 1043420 1093736 1132798 1367170 1562480 2086840 2187472 2265596 2734340 2831995 3964793 4173680 4531192 5019467 5468680 5663990 7929586 9062384 10038934 10937360 11327980 15859172 19823965 20077868 22655960 25097335 31718344 35136269 39647930 40155736 45311920 50194670 63436688 70272538 79295860 80311472 100389340 140545076 145564543 158591720 175681345 200778680 281090152 291129086 317183440 351362690 401557360 562180304 582258172 702725380 727822715 1018951801 1164516344 1405450760 1455645430 2037903602 2329032688 2810901520 2911290860 4075807204 5094759005 5822581720 8151614408 10189518010 11645163440 16303228816 20379036020 40758072040 81516144080
• Sum of all divisors σ(n): 224952387840
• Sum of proper divisors (its aliquot sum) s(n): 143436243760
• 81516144080 is an abundant number, because the sum of its proper divisors (143436243760) is greater than itself. Its abundance is 61920099680

Bases of 81516144080

• Binary: 1001011111010101111011010010111010000₂
• Hexadecimal: 0x12FABDA5D0
• Base-36: 11G4LVBK

Squares and roots of 81516144080

• 81516144080 squared (81516144080²) is 6644881745671319046400
• 81516144080 cubed (81516144080³) is 541665137774705159709990605312000
• The square root of 81516144080 is 285510.3221951879
• The cube root of 81516144080 is 4335.9194885833

Scales and comparisons

• 81,516,144,080 seconds is equal to 2,591 years, 49 weeks, 6 days, 21 hours, 21 minutes, 20 seconds.
• To count from 1 to 81,516,144,080 would take you about five thousand, one hundred eighty-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 81516144080 cubic inches would be around 361.3 feet tall.

Recreational maths with 81516144080

• 81516144080 backwards is 08044161518
• The number of decimal digits it has is: 11
• The sum of 81516144080's digits is 38
• More coming soon!