81429656800

Names of 81429656800

• Cardinal: 81429656800 can be written as Eighty-one billion, four hundred twenty-nine million, six hundred fifty-six thousand, eight hundred.

Scientific notation

• Scientific notation: 8.14296568 × 10¹⁰

Factors of 81429656800

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 1116

Divisors of 81429656800

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 29 32 40 50 58 80 100 116 127 145 160 200 232 254 290 400 464 508 580 635 725 800 841 928 953 1016 1160 1270 1450 1682 1906 2032 2320 2540 2900 3175 3364 3683 3812 4064 4205 4640 4765 5080 5800 6350 6728 7366 7624 8410 9530 10160 11600 12700 13456 14732 15248 16820 18415 19060 20320 21025 23200 23825 25400 26912 27637 29464 30496 33640 36830 38120 42050 47650 50800 55274 58928 67280 73660 76240 84100 92075 95300 101600 106807 110548 117856 121031 134560 138185 147320 152480 168200 184150 190600 213614 221096 242062 276370 294640 336400 368300 381200 427228 442192 484124 534035 552740 589280 605155 672800 690925 736600 762400 801473 854456 884384 968248 1068070 1105480 1210310 1381850 1473200 1602946 1708912 1936496 2136140 2210960 2420620 2670175 2763700 2946400 3025775 3205892 3417824 3509899 3872992 4007365 4272280 4421920 4841240 5340350 5527400 6051550 6411784 7019798 8014730 8544560 9682480 10680700 11054800 12103100 12823568 14039596 16029460 17089120 17549495 19364960 20036825 21361400 22109600 24206200 25647136 28079192 32058920 35098990 40073650 42722800 48412400 56158384 64117840 70197980 80147300 85445600 87747475 96824800 101787071 112316768 128235680 140395960 160294600 175494950 203574142 280791920 320589200 350989900 407148284 508935355 561583840 641178400 701979800 814296568 1017870710 1403959600 1628593136 2035741420 2544676775 2807919200 3257186272 4071482840 5089353550 8142965680 10178707100 16285931360 20357414200 40714828400 81429656800
• Sum of all divisors σ(n): 207720205056
• Sum of proper divisors (its aliquot sum) s(n): 126290548256
• 81429656800 is an abundant number, because the sum of its proper divisors (126290548256) is greater than itself. Its abundance is 44860891456

Bases of 81429656800

• Binary: 1001011110101100101011111010011100000₂
• Hexadecimal: 0x12F595F4E0
• Base-36: 11EP45B4

Squares and roots of 81429656800

• 81429656800 squared (81429656800²) is 6630789006565786240000
• 81429656800 cubed (81429656800³) is 539942873117864920145362432000000
• The square root of 81429656800 is 285358.8211357763
• The cube root of 81429656800 is 4334.3854996665

Scales and comparisons

• 81,429,656,800 seconds is equal to 2,589 years, 10 weeks, 6 days, 21 hours, 6 minutes, 40 seconds.
• To count from 1 to 81,429,656,800 would take you about five thousand, one hundred seventy-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 81429656800 cubic inches would be around 361.2 feet tall.

Recreational maths with 81429656800

• 81429656800 backwards is 00865692418
• The number of decimal digits it has is: 11
• The sum of 81429656800's digits is 49
• More coming soon!