81438018816
81,438,018,816 is an even composite number composed of six prime numbers multiplied together.
81438018816 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of four hundred thirty-two divisors.
Prime factorization of 81438018816:
28 × 3 × 72 × 11 × 113 × 1741
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 7 × 7 × 11 × 113 × 1741)See below for interesting mathematical facts about the number 81438018816 from the Numbermatics database.
Names of 81438018816
- Cardinal: 81438018816 can be written as Eighty-one billion, four hundred thirty-eight million, eighteen thousand, eight hundred sixteen.
Scientific notation
- Scientific notation: 8.1438018816 × 1010
Factors of 81438018816
Divisors of 81438018816
- Number of divisors d(n): 432
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Complete list of divisors:
1 2 3 4 6 7 8 11 12 14 16 21 22 24 28 32 33 42 44 48 49 56 64 66 77 84 88 96 98 112 113 128 132 147 154 168 176 192 196 224 226 231 256 264 294 308 336 339 352 384 392 448 452 462 528 539 588 616 672 678 704 768 784 791 896 904 924 1056 1078 1176 1232 1243 1344 1356 1408 1568 1582 1617 1741 1792 1808 1848 2112 2156 2352 2373 2464 2486 2688 2712 2816 3136 3164 3234 3482 3616 3696 3729 4224 4312 4704 4746 4928 4972 5223 5376 5424 5537 6272 6328 6468 6964 7232 7392 7458 8448 8624 8701 9408 9492 9856 9944 10446 10848 11074 12187 12544 12656 12936 13928 14464 14784 14916 16611 17248 17402 18816 18984 19151 19712 19888 20892 21696 22148 24374 25312 25872 26103 27856 28928 29568 29832 33222 34496 34804 36561 37632 37968 38302 39776 41784 43392 44296 48748 50624 51744 52206 55712 57453 59136 59664 60907 66444 68992 69608 73122 75936 76604 79552 83568 85309 86784 88592 97496 101248 103488 104412 111424 114906 119328 121814 132888 134057 137984 139216 146244 151872 153208 159104 167136 170618 177184 182721 194992 196733 202496 206976 208824 222848 229812 238656 243628 255927 265776 268114 278432 292488 303744 306416 318208 334272 341236 354368 365442 389984 393466 402171 413952 417648 445696 459624 477312 487256 511854 531552 536228 556864 584976 590199 607488 612832 668544 682472 708736 730884 779968 786932 804342 835296 919248 938399 954624 974512 1023708 1063104 1072456 1113728 1169952 1180398 1225664 1337088 1364944 1377131 1417472 1461768 1559936 1573864 1608684 1670592 1838496 1876798 1949024 2047416 2126208 2144912 2164063 2227456 2339904 2360796 2451328 2729888 2754262 2815197 2923536 3119872 3147728 3217368 3341184 3676992 3753596 3898048 4094832 4131393 4252416 4289824 4328126 4679808 4721592 4902656 5459776 5508524 5630394 5847072 6295456 6434736 6492189 6682368 7353984 7507192 7796096 8189664 8262786 8579648 8656252 9359616 9443184 9639917 10919552 11017048 11260788 11694144 12590912 12869472 12984378 14707968 15014384 15148441 15592192 16379328 16525572 17159296 17312504 18886368 19279834 21839104 22034096 22521576 23388288 25181824 25738944 25968756 28919751 30028768 30296882 32758656 33051144 34318592 34625008 37772736 38559668 44068192 45043152 45445323 46776576 50363648 51477888 51937512 57839502 60057536 60593764 65517312 66102288 69250016 75545472 77119336 88136384 90086304 90890646 102955776 103875024 106039087 115679004 120115072 121187528 132204576 138500032 151090944 154238672 176272768 180172608 181781292 207750048 212078174 231358008 240230144 242375056 264409152 277000064 308477344 318117261 352545536 360345216 363562584 415500096 424156348 462716016 484750112 528818304 554000128 616954688 636234522 720690432 727125168 831000192 848312696 925432032 969500224 1057636608 1233909376 1272469044 1454250336 1662000384 1696625392 1850864064 1939000448 2467818752 2544938088 2908500672 3393250784 3701728128 3878000896 5089876176 5817001344 6786501568 7403456256 10179752352 11634002688 13573003136 20359504704 27146006272 40719009408 81438018816
- Sum of all divisors σ(n): 277645088448
- Sum of proper divisors (its aliquot sum) s(n): 196207069632
- 81438018816 is an abundant number, because the sum of its proper divisors (196207069632) is greater than itself. Its abundance is 114769050816
Bases of 81438018816
- Binary: 10010111101100001010110001101000000002
- Hexadecimal: 0x12F6158D00
- Base-36: 11EU3DHC
Squares and roots of 81438018816
- 81438018816 squared (814380188162) is 6632150908675170041856
- 81438018816 cubed (814380188163) is 540109230491239995500668435562496
-
The
square root of 81438018816 is 285373.4725162799 -
The
cube root of 81438018816 is 4334.5338606843
Scales and comparisons
How big is 81438018816?- 81,438,018,816 seconds is equal to 2,589 years, 24 weeks, 5 days, 15 hours, 53 minutes, 36 seconds.
-
To count from 1 to 81,438,018,816 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 81438018816 cubic inches would be around 361.2 feet tall.
Recreational maths with 81438018816
- 81438018816 backwards is 61881083418
- 81438018816 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81438018816's digits is 48
- More coming soon!
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The information we have on file for 81438018816 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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