81427713920
81,427,713,920 is an even composite number composed of five prime numbers multiplied together.
81427713920 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred ninety-two divisors.
Prime factorization of 81427713920:
27 × 5 × 72 × 317 × 8191
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 7 × 7 × 317 × 8191)See below for interesting mathematical facts about the number 81427713920 from the Numbermatics database.
Names of 81427713920
- Cardinal: 81427713920 can be written as Eighty-one billion, four hundred twenty-seven million, seven hundred thirteen thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 8.142771392 × 1010
Factors of 81427713920
Divisors of 81427713920
- Number of divisors d(n): 192
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Complete list of divisors:
1 2 4 5 7 8 10 14 16 20 28 32 35 40 49 56 64 70 80 98 112 128 140 160 196 224 245 280 317 320 392 448 490 560 634 640 784 896 980 1120 1268 1568 1585 1960 2219 2240 2536 3136 3170 3920 4438 4480 5072 6272 6340 7840 8191 8876 10144 11095 12680 15533 15680 16382 17752 20288 22190 25360 31066 31360 32764 35504 40576 40955 44380 50720 57337 62132 65528 71008 77665 81910 88760 101440 114674 124264 131056 142016 155330 163820 177520 202880 229348 248528 262112 284032 286685 310660 327640 355040 401359 458696 497056 524224 573370 621320 655280 710080 802718 917392 994112 1048448 1146740 1242640 1310560 1420160 1605436 1834784 1988224 2006795 2293480 2485280 2596547 2621120 3210872 3669568 4013590 4586960 4970560 5193094 5242240 6421744 7339136 8027180 9173920 9941120 10386188 12843488 12982735 16054360 18175829 18347840 20772376 25686976 25965470 32108720 36351658 36695680 41544752 51373952 51930940 64217440 72703316 83089504 90879145 103861880 127230803 128434880 145406632 166179008 181758290 207723760 254461606 256869760 290813264 332358016 363516580 415447520 508923212 581626528 636154015 727033160 830895040 1017846424 1163253056 1272308030 1454066320 1661790080 2035692848 2326506112 2544616060 2908132640 4071385696 5089232120 5816265280 8142771392 10178464240 11632530560 16285542784 20356928480 40713856960 81427713920
- Sum of all divisors σ(n): 227186933760
- Sum of proper divisors (its aliquot sum) s(n): 145759219840
- 81427713920 is an abundant number, because the sum of its proper divisors (145759219840) is greater than itself. Its abundance is 64331505920
Bases of 81427713920
- Binary: 10010111101010111100001001111100000002
- Hexadecimal: 0x12F5784F80
- Base-36: 11ENYI68
Squares and roots of 81427713920
- 81427713920 squared (814277139202) is 6630472594237361766400
- 81427713920 cubed (814277139203) is 539904225557960134489965068288000
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The
square root of 81427713920 is 285355.4168401223 -
The
cube root of 81427713920 is 4334.3510271405
Scales and comparisons
How big is 81427713920?- 81,427,713,920 seconds is equal to 2,589 years, 7 weeks, 5 days, 9 hours, 25 minutes, 20 seconds.
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To count from 1 to 81,427,713,920 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 81427713920 cubic inches would be around 361.2 feet tall.
Recreational maths with 81427713920
- 81427713920 backwards is 02931772418
- The number of decimal digits it has is: 11
- The sum of 81427713920's digits is 44
- More coming soon!
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