81340992720
81,340,992,720 is an even composite number composed of six prime numbers multiplied together.
81340992720 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of three hundred twenty divisors.
Prime factorization of 81340992720:
24 × 33 × 5 × 13 × 19 × 152461
(2 × 2 × 2 × 2 × 3 × 3 × 3 × 5 × 13 × 19 × 152461)See below for interesting mathematical facts about the number 81340992720 from the Numbermatics database.
Names of 81340992720
- Cardinal: 81340992720 can be written as Eighty-one billion, three hundred forty million, nine hundred ninety-two thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 8.134099272 × 1010
Factors of 81340992720
Divisors of 81340992720
- Number of divisors d(n): 320
-
Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 13 15 16 18 19 20 24 26 27 30 36 38 39 40 45 48 52 54 57 60 65 72 76 78 80 90 95 104 108 114 117 120 130 135 144 152 156 171 180 190 195 208 216 228 234 240 247 260 270 285 304 312 342 351 360 380 390 432 456 468 494 513 520 540 570 585 624 684 702 720 741 760 780 855 912 936 988 1026 1040 1080 1140 1170 1235 1368 1404 1482 1520 1560 1710 1755 1872 1976 2052 2160 2223 2280 2340 2470 2565 2736 2808 2964 3120 3420 3510 3705 3952 4104 4446 4560 4680 4940 5130 5616 5928 6669 6840 7020 7410 8208 8892 9360 9880 10260 11115 11856 13338 13680 14040 14820 17784 19760 20520 22230 26676 28080 29640 33345 35568 41040 44460 53352 59280 66690 88920 106704 133380 152461 177840 266760 304922 457383 533520 609844 762305 914766 1219688 1372149 1524610 1829532 1981993 2286915 2439376 2744298 2896759 3049220 3659064 3963986 4116447 4573830 5488596 5793518 5945979 6098440 6860745 7318128 7927972 8232894 8690277 9147660 9909965 10977192 11587036 11891958 12196880 13721490 14483795 15855944 16465788 17380554 17837937 18295320 19819930 20582235 21954384 23174072 23783916 26070831 27442980 28967590 29729895 31711888 32931576 34761108 35675874 36590640 37657867 39639860 41164470 43451385 46348144 47567832 52141662 53513811 54885960 57935180 59459790 65863152 69522216 71351748 75315734 78212493 79279720 82328940 86902770 89189685 95135664 104283324 107027622 109771920 112973601 115870360 118919580 130354155 139044432 142703496 150631468 156424986 158559440 164657880 173805540 178379370 188289335 208566648 214055244 225947202 231740720 237839160 260708310 267569055 285406992 301262936 312849972 329315760 338920803 347611080 356758740 376578670 391062465 417133296 428110488 451894404 475678320 521416620 535138110 564868005 602525872 625699944 677841606 695222160 713517480 753157340 782124930 856220976 903788808 1016762409 1042833240 1070276220 1129736010 1251399888 1355683212 1427034960 1506314680 1564249860 1694604015 1807577616 2033524818 2085666480 2140552440 2259472020 2711366424 3012629360 3128499720 3389208030 4067049636 4281104880 4518944040 5083812045 5422732848 6256999440 6778416060 8134099272 9037888080 10167624090 13556832120 16268198544 20335248180 27113664240 40670496360 81340992720
- Sum of all divisors σ(n): 317608838400
- Sum of proper divisors (its aliquot sum) s(n): 236267845680
- 81340992720 is an abundant number, because the sum of its proper divisors (236267845680) is greater than itself. Its abundance is 154926852960
Bases of 81340992720
- Binary: 10010111100000100110100001100110100002
- Hexadecimal: 0x12F04D0CD0
- Base-36: 11D8BRO0
Squares and roots of 81340992720
- 81340992720 squared (813409927202) is 6616357096675092998400
- 81340992720 cubed (813409927203) is 538181054433569075788177371648000
-
The
square root of 81340992720 is 285203.4234016135 -
The
cube root of 81340992720 is 4332.8117738089
Scales and comparisons
How big is 81340992720?- 81,340,992,720 seconds is equal to 2,586 years, 20 weeks, 2 days, 16 hours, 12 minutes.
-
To count from 1 to 81,340,992,720 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 81340992720 cubic inches would be around 361.1 feet tall.
Recreational maths with 81340992720
- 81340992720 backwards is 02729904318
- 81340992720 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81340992720's digits is 45
- More coming soon!
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