81329421440
81,329,421,440 is an even composite number composed of five prime numbers multiplied together.
81329421440 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred twenty-eight divisors.
Prime factorization of 81329421440:
27 × 5 × 151 × 199 × 4229
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 151 × 199 × 4229)See below for interesting mathematical facts about the number 81329421440 from the Numbermatics database.
Names of 81329421440
- Cardinal: 81329421440 can be written as Eighty-one billion, three hundred twenty-nine million, four hundred twenty-one thousand, four hundred forty.
Scientific notation
- Scientific notation: 8.132942144 × 1010
Factors of 81329421440
Divisors of 81329421440
- Number of divisors d(n): 128
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Complete list of divisors:
1 2 4 5 8 10 16 20 32 40 64 80 128 151 160 199 302 320 398 604 640 755 796 995 1208 1510 1592 1990 2416 3020 3184 3980 4229 4832 6040 6368 7960 8458 9664 12080 12736 15920 16916 19328 21145 24160 25472 30049 31840 33832 42290 48320 60098 63680 67664 84580 96640 120196 127360 135328 150245 169160 240392 270656 300490 338320 480784 541312 600980 638579 676640 841571 961568 1201960 1277158 1353280 1683142 1923136 2403920 2554316 2706560 3192895 3366284 3846272 4207855 4807840 5108632 6385790 6732568 8415710 9615680 10217264 12771580 13465136 16831420 19231360 20434528 25543160 26930272 33662840 40869056 51086320 53860544 67325680 81738112 102172640 107721088 127077221 134651360 204345280 254154442 269302720 408690560 508308884 538605440 635386105 1016617768 1270772210 2033235536 2541544420 4066471072 5083088840 8132942144 10166177680 16265884288 20332355360 40664710720 81329421440
- Sum of all divisors σ(n): 196745760000
- Sum of proper divisors (its aliquot sum) s(n): 115416338560
- 81329421440 is an abundant number, because the sum of its proper divisors (115416338560) is greater than itself. Its abundance is 34086917120
Bases of 81329421440
- Binary: 10010111011111001110001111100100000002
- Hexadecimal: 0x12EF9C7C80
- Base-36: 11D1FR7K
Squares and roots of 81329421440
- 81329421440 squared (813294214402) is 6614474791765131673600
- 81329421440 cubed (813294214403) is 537951407943722635379306921984000
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The
square root of 81329421440 is 285183.1366683523 -
The
cube root of 81329421440 is 4332.6063072737
Scales and comparisons
How big is 81329421440?- 81,329,421,440 seconds is equal to 2,586 years, 1 week, 1 day, 17 hours, 57 minutes, 20 seconds.
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To count from 1 to 81,329,421,440 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 81329421440 cubic inches would be around 361.1 feet tall.
Recreational maths with 81329421440
- 81329421440 backwards is 04412492318
- The number of decimal digits it has is: 11
- The sum of 81329421440's digits is 38
- More coming soon!
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The information we have on file for 81329421440 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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