81321739680
81,321,739,680 is an even composite number composed of five prime numbers multiplied together.
81321739680 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 81321739680:
25 × 3 × 5 × 292 × 201451
(2 × 2 × 2 × 2 × 2 × 3 × 5 × 29 × 29 × 201451)See below for interesting mathematical facts about the number 81321739680 from the Numbermatics database.
Names of 81321739680
- Cardinal: 81321739680 can be written as Eighty-one billion, three hundred twenty-one million, seven hundred thirty-nine thousand, six hundred eighty.
Scientific notation
- Scientific notation: 8.132173968 × 1010
Factors of 81321739680
Divisors of 81321739680
- Number of divisors d(n): 144
-
Complete list of divisors:
1 2 3 4 5 6 8 10 12 15 16 20 24 29 30 32 40 48 58 60 80 87 96 116 120 145 160 174 232 240 290 348 435 464 480 580 696 841 870 928 1160 1392 1682 1740 2320 2523 2784 3364 3480 4205 4640 5046 6728 6960 8410 10092 12615 13456 13920 16820 20184 25230 26912 33640 40368 50460 67280 80736 100920 134560 201451 201840 402902 403680 604353 805804 1007255 1208706 1611608 2014510 2417412 3021765 3223216 4029020 4834824 5842079 6043530 6446432 8058040 9669648 11684158 12087060 16116080 17526237 19339296 23368316 24174120 29210395 32232160 35052474 46736632 48348240 58420790 70104948 87631185 93473264 96696480 116841580 140209896 169420291 175262370 186946528 233683160 280419792 338840582 350524740 467366320 508260873 560839584 677681164 701049480 847101455 934732640 1016521746 1355362328 1402098960 1694202910 2033043492 2541304365 2710724656 2804197920 3388405820 4066086984 5082608730 5421449312 6776811640 8132173968 10165217460 13553623280 16264347936 20330434920 27107246560 40660869840 81321739680
- Sum of all divisors σ(n): 265302614304
- Sum of proper divisors (its aliquot sum) s(n): 183980874624
- 81321739680 is an abundant number, because the sum of its proper divisors (183980874624) is greater than itself. Its abundance is 102659134944
Bases of 81321739680
- Binary: 10010111011110010011101000101101000002
- Hexadecimal: 0x12EF2745A0
- Base-36: 11CWV3XC
Squares and roots of 81321739680
- 81321739680 squared (813217396802) is 6613225344581686502400
- 81321739680 cubed (813217396803) is 537798989917250208243542495232000
-
The
square root of 81321739680 is 285169.6682327909 -
The
cube root of 81321739680 is 4332.4698946073
Scales and comparisons
How big is 81321739680?- 81,321,739,680 seconds is equal to 2,585 years, 40 weeks, 3 days, 20 hours, 8 minutes.
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To count from 1 to 81,321,739,680 would take you about five thousand, one hundred seventy-one 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 81321739680 cubic inches would be around 361 feet tall.
Recreational maths with 81321739680
- 81321739680 backwards is 08693712318
- 81321739680 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81321739680's digits is 48
- More coming soon!
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The information we have on file for 81321739680 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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