81001326720
81,001,326,720 is an even composite number composed of six prime numbers multiplied together.
81001326720 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of two hundred fifty-six divisors.
Prime factorization of 81001326720:
27 × 3 × 5 × 137 × 293 × 1051
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 5 × 137 × 293 × 1051)See below for interesting mathematical facts about the number 81001326720 from the Numbermatics database.
Names of 81001326720
- Cardinal: 81001326720 can be written as Eighty-one billion, one million, three hundred twenty-six thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 8.100132672 × 1010
Factors of 81001326720
Divisors of 81001326720
- Number of divisors d(n): 256
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Complete list of divisors:
1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 64 80 96 120 128 137 160 192 240 274 293 320 384 411 480 548 586 640 685 822 879 960 1051 1096 1172 1370 1465 1644 1758 1920 2055 2102 2192 2344 2740 2930 3153 3288 3516 4110 4204 4384 4395 4688 5255 5480 5860 6306 6576 7032 8220 8408 8768 8790 9376 10510 10960 11720 12612 13152 14064 15765 16440 16816 17536 17580 18752 21020 21920 23440 25224 26304 28128 31530 32880 33632 35160 37504 40141 42040 43840 46880 50448 52608 56256 63060 65760 67264 70320 80282 84080 87680 93760 100896 112512 120423 126120 131520 134528 140640 143987 160564 168160 187520 200705 201792 240846 252240 263040 281280 287974 307943 321128 336320 401410 403584 431961 481692 504480 562560 575948 602115 615886 642256 672640 719935 802820 863922 923829 963384 1008960 1151896 1204230 1231772 1284512 1439870 1539715 1605640 1727844 1847658 1926768 2017920 2159805 2303792 2408460 2463544 2569024 2879740 3079430 3211280 3455688 3695316 3853536 4319610 4607584 4619145 4816920 4927088 5138048 5759480 6158860 6422560 6911376 7390632 7707072 8639220 9215168 9238290 9633840 9854176 11518960 12317720 12845120 13822752 14781264 15414144 17278440 18430336 18476580 19267680 19708352 23037920 24635440 25690240 27645504 29562528 34556880 36953160 38535360 39416704 42188191 46075840 49270880 55291008 59125056 69113760 73906320 77070720 84376382 92151680 98541760 118250112 126564573 138227520 147812640 168752764 197083520 210940955 253129146 276455040 295625280 337505528 421881910 506258292 591250560 632822865 675011056 843763820 1012516584 1265645730 1350022112 1687527640 2025033168 2531291460 2700044224 3375055280 4050066336 5062582920 5400088448 6750110560 8100132672 10125165840 13500221120 16200265344 20250331680 27000442240 40500663360 81001326720
- Sum of all divisors σ(n): 261212273280
- Sum of proper divisors (its aliquot sum) s(n): 180210946560
- 81001326720 is an abundant number, because the sum of its proper divisors (180210946560) is greater than itself. Its abundance is 99209619840
Bases of 81001326720
- Binary: 10010110111000000111000101000100000002
- Hexadecimal: 0x12DC0E2880
- Base-36: 117M3JPC
Squares and roots of 81001326720
- 81001326720 squared (810013267202) is 6561214930400185958400
- 81001326720 cubed (810013267203) is 531467114257487523165114728448000
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The
square root of 81001326720 is 284607.3202150641 -
The
cube root of 81001326720 is 4326.7723337729
Scales and comparisons
How big is 81001326720?- 81,001,326,720 seconds is equal to 2,575 years, 30 weeks, 5 days, 8 hours, 32 minutes.
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To count from 1 to 81,001,326,720 would take you about five thousand, one hundred fifty-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 81001326720 cubic inches would be around 360.6 feet tall.
Recreational maths with 81001326720
- 81001326720 backwards is 02762310018
- 81001326720 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81001326720's digits is 30
- More coming soon!
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