81368536040
81,368,536,040 is an even composite number composed of six prime numbers multiplied together.
81368536040 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of two hundred eighty-eight divisors.
Prime factorization of 81368536040:
23 × 5 × 112 × 412 × 73 × 137
(2 × 2 × 2 × 5 × 11 × 11 × 41 × 41 × 73 × 137)See below for interesting mathematical facts about the number 81368536040 from the Numbermatics database.
Names of 81368536040
- Cardinal: 81368536040 can be written as Eighty-one billion, three hundred sixty-eight million, five hundred thirty-six thousand and forty.
Scientific notation
- Scientific notation: 8.136853604 × 1010
Factors of 81368536040
Divisors of 81368536040
- Number of divisors d(n): 288
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Complete list of divisors:
1 2 4 5 8 10 11 20 22 40 41 44 55 73 82 88 110 121 137 146 164 205 220 242 274 292 328 365 410 440 451 484 548 584 605 685 730 803 820 902 968 1096 1210 1370 1460 1507 1606 1640 1681 1804 2255 2420 2740 2920 2993 3014 3212 3362 3608 4015 4510 4840 4961 5480 5617 5986 6028 6424 6724 7535 8030 8405 8833 9020 9922 10001 11234 11972 12056 13448 14965 15070 16060 16577 16810 17666 18040 18491 19844 20002 22468 23944 24805 28085 29930 30140 32120 32923 33154 33620 35332 36982 39688 40004 44165 44936 49610 50005 56170 59860 60280 61787 65846 66308 67240 70664 73964 80008 82885 88330 92455 99220 100010 110011 112340 119720 122713 123574 131692 132616 147928 164615 165770 176660 184910 198440 200020 203401 220022 224680 230297 245426 247148 263384 308935 329230 331540 353320 362153 369820 400040 406802 410041 440044 460594 490852 494296 550055 613565 617870 658460 663080 679657 724306 739640 813604 820082 880088 921188 981704 1017005 1100110 1151485 1210121 1227130 1235740 1316920 1349843 1359314 1448612 1627208 1640164 1810765 1842376 2034010 2050205 2200220 2302970 2420242 2454260 2471480 2533267 2699686 2718628 2897224 3280328 3398285 3621530 4068020 4100410 4400440 4510451 4605940 4840484 4908520 5066534 5399372 5437256 6050605 6749215 6796570 7243060 8136040 8200820 9020902 9211880 9680968 10133068 10798744 12101210 12666335 13498430 13593140 14486120 14848273 16401640 16811681 18041804 20266136 22552255 24202420 25332670 26996860 27186280 27865937 29696546 33623362 36083608 45104510 48404840 49614961 50665340 53993720 55731874 59393092 67246724 74241365 84058405 90209020 99229922 101330680 111463748 118786184 134493448 139329685 148482730 168116810 180418040 184928491 198459844 222927496 248074805 278659370 296965460 336233620 369856982 396919688 496149610 557318740 593930920 672467240 739713964 924642455 992299220 1114637480 1479427928 1849284910 1984598440 2034213401 3698569820 4068426802 7397139640 8136853604 10171067005 16273707208 20342134010 40684268020 81368536040
- Sum of all divisors σ(n): 210615453720
- Sum of proper divisors (its aliquot sum) s(n): 129246917680
- 81368536040 is an abundant number, because the sum of its proper divisors (129246917680) is greater than itself. Its abundance is 47878381640
Bases of 81368536040
- Binary: 10010111100011111000101010011111010002
- Hexadecimal: 0x12F1F153E8
- Base-36: 11DOQ488
Squares and roots of 81368536040
- 81368536040 squared (813685360402) is 6620838657292778881600
- 81368536040 cubed (813685360403) is 538727948900952687259220492864000
-
The
square root of 81368536040 is 285251.7064629061 -
The
cube root of 81368536040 is 4333.3007710111
Scales and comparisons
How big is 81368536040?- 81,368,536,040 seconds is equal to 2,587 years, 13 weeks, 6 days, 11 hours, 7 minutes, 20 seconds.
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To count from 1 to 81,368,536,040 would take you about five thousand, one hundred seventy-four 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 81368536040 cubic inches would be around 361.1 feet tall.
Recreational maths with 81368536040
- 81368536040 backwards is 04063586318
- 81368536040 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81368536040's digits is 44
- More coming soon!
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