81138340400
81,138,340,400 is an even composite number composed of six prime numbers multiplied together.
81138340400 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of two hundred forty divisors.
Prime factorization of 81138340400:
24 × 52 × 13 × 79 × 263 × 751
(2 × 2 × 2 × 2 × 5 × 5 × 13 × 79 × 263 × 751)See below for interesting mathematical facts about the number 81138340400 from the Numbermatics database.
Names of 81138340400
- Cardinal: 81138340400 can be written as Eighty-one billion, one hundred thirty-eight million, three hundred forty thousand, four hundred.
Scientific notation
- Scientific notation: 8.11383404 × 1010
Factors of 81138340400
Divisors of 81138340400
- Number of divisors d(n): 240
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Complete list of divisors:
1 2 4 5 8 10 13 16 20 25 26 40 50 52 65 79 80 100 104 130 158 200 208 260 263 316 325 395 400 520 526 632 650 751 790 1027 1040 1052 1264 1300 1315 1502 1580 1975 2054 2104 2600 2630 3004 3160 3419 3755 3950 4108 4208 5135 5200 5260 6008 6320 6575 6838 7510 7900 8216 9763 10270 10520 12016 13150 13676 15020 15800 16432 17095 18775 19526 20540 20777 21040 25675 26300 27352 30040 31600 34190 37550 39052 41080 41554 48815 51350 52600 54704 59329 60080 68380 75100 78104 82160 83108 85475 97630 102700 103885 105200 118658 136760 150200 156208 166216 170950 195260 197513 205400 207770 237316 244075 270101 273520 296645 300400 332432 341900 390520 395026 410800 415540 474632 488150 519425 540202 593290 683800 771277 781040 790052 831080 949264 976300 987565 1038850 1080404 1186580 1350505 1367600 1483225 1542554 1580104 1662160 1952600 1975130 2077700 2160808 2373160 2567669 2701010 2966450 3085108 3160208 3856385 3905200 3950260 4155400 4321616 4746320 4937825 5135338 5402020 5932900 6170216 6752525 7712770 7900520 8310800 9875650 10270676 10804040 11865800 12340432 12838345 13505050 15425540 15603527 15801040 19281925 19751300 20541352 21608080 23731600 25676690 27010100 30851080 31207054 38563850 39502600 41082704 51353380 54020200 61702160 62414108 64191725 77127700 78017635 79005200 102706760 108040400 124828216 128383450 154255400 156035270 202845851 205413520 249656432 256766900 308510800 312070540 390088175 405691702 513533800 624141080 780176350 811383404 1014229255 1027067600 1248282160 1560352700 1622766808 2028458510 3120705400 3245533616 4056917020 5071146275 6241410800 8113834040 10142292550 16227668080 20284585100 40569170200 81138340400
- Sum of all divisors σ(n): 213679656960
- Sum of proper divisors (its aliquot sum) s(n): 132541316560
- 81138340400 is an abundant number, because the sum of its proper divisors (132541316560) is greater than itself. Its abundance is 51402976160
Bases of 81138340400
- Binary: 10010111001000011100011010010001100002
- Hexadecimal: 0x12E438D230
- Base-36: 119VO84W
Squares and roots of 81138340400
- 81138340400 squared (811383404002) is 6583430282866272160000
- 81138340400 cubed (811383404003) is 534168607290871878197123264000000
-
The
square root of 81138340400 is 284847.9250407137 -
The
cube root of 81138340400 is 4329.2105368751
Scales and comparisons
How big is 81138340400?- 81,138,340,400 seconds is equal to 2,579 years, 49 weeks, 2 days, 3 hours, 53 minutes, 20 seconds.
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To count from 1 to 81,138,340,400 would take you about five thousand, one hundred fifty-nine 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 81138340400 cubic inches would be around 360.8 feet tall.
Recreational maths with 81138340400
- 81138340400 backwards is 00404383118
- The number of decimal digits it has is: 11
- The sum of 81138340400's digits is 32
- More coming soon!
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