81438742539
81,438,742,539 is an odd composite number composed of seven prime numbers multiplied together.
81438742539 is an odd composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two hundred eighty-eight divisors.
Prime factorization of 81438742539:
32 × 7 × 112 × 17 × 23 × 89 × 307
(3 × 3 × 7 × 11 × 11 × 17 × 23 × 89 × 307)See below for interesting mathematical facts about the number 81438742539 from the Numbermatics database.
Names of 81438742539
- Cardinal: 81438742539 can be written as Eighty-one billion, four hundred thirty-eight million, seven hundred forty-two thousand, five hundred thirty-nine.
Scientific notation
- Scientific notation: 8.1438742539 × 1010
Factors of 81438742539
Divisors of 81438742539
- Number of divisors d(n): 288
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Complete list of divisors:
1 3 7 9 11 17 21 23 33 51 63 69 77 89 99 119 121 153 161 187 207 231 253 267 307 357 363 391 483 561 623 693 759 801 847 921 979 1071 1089 1173 1309 1449 1513 1683 1771 1869 2047 2057 2149 2277 2541 2737 2763 2783 2937 3377 3519 3927 4301 4539 5219 5313 5607 6141 6171 6447 6853 7061 7623 8211 8349 8811 10131 10591 10769 11781 12903 13617 14329 14399 15657 15939 16643 18423 18513 19341 19481 20559 21183 22517 23639 24633 25047 27323 30107 30393 31773 32307 34799 36533 37147 38709 42987 43197 46971 47311 49427 49929 57409 58443 61677 63549 67551 70917 75383 77671 81969 90321 95319 96921 104397 109599 111441 116501 120037 128961 129591 141933 148281 149787 157619 172227 175329 183073 191261 202653 212751 226149 233013 243593 245907 247687 260029 270963 300553 313191 328797 331177 334323 349503 360111 382789 401863 425799 444843 464491 472857 516681 543697 549219 573783 628429 631499 678447 699039 730779 743061 780087 840259 854381 901659 993531 1048509 1080333 1148367 1205589 1281511 1320407 1393473 1418571 1631091 1647657 1721349 1733809 1885287 1894497 2103871 2192337 2229183 2340261 2520777 2563143 2679523 2704977 2980593 3251437 3306083 3445101 3616767 3844533 3961221 4180419 4210679 4399003 4420493 4893273 5109401 5201427 5655861 5683491 5980667 6311613 6912719 7562331 7689429 8038569 9242849 9754311 9918249 10683293 11533599 11883663 12632037 13197009 13261479 14524477 15328203 15604281 17942001 18934839 20738157 23142581 24115707 27728547 29262933 29474753 29754747 32049879 35765807 37896111 39591027 39784437 43573431 45984609 48389033 53826003 56203411 62214471 69427743 74783051 76039909 83185641 88424259 96149637 101671339 107297421 117516223 130720293 145167099 168610233 208283229 224349153 228119727 265272777 305014017 321892263 352548669 393423877 435501297 505830699 532279363 673047459 684359181 822613561 915042051 1057646007 1180271631 1292678453 1596838089 2467840683 3540814893 3878035359 4790514267 7403522049 9048749171 11634106077 27146247513 81438742539
- Sum of all divisors σ(n): 165638753280
- Sum of proper divisors (its aliquot sum) s(n): 84200010741
- 81438742539 is an abundant number, because the sum of its proper divisors (84200010741) is greater than itself. Its abundance is 2761268202
Bases of 81438742539
- Binary: 10010111101100010000010011000000010112
- Hexadecimal: 0x12F620980B
- Base-36: 11EUIVWR
Squares and roots of 81438742539
- 81438742539 squared (814387425392) is 6632268786333528166521
- 81438742539 cubed (814387425393) is 540123630139662202136808438336819
-
The
square root of 81438742539 is 285374.7405412749 -
The
cube root of 81438742539 is 4334.5467006847
Scales and comparisons
How big is 81438742539?- 81,438,742,539 seconds is equal to 2,589 years, 26 weeks, 55 minutes, 39 seconds.
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To count from 1 to 81,438,742,539 would take you about five thousand, one hundred seventy-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 81438742539 cubic inches would be around 361.2 feet tall.
Recreational maths with 81438742539
- 81438742539 backwards is 93524783418
- The number of decimal digits it has is: 11
- The sum of 81438742539's digits is 54
- More coming soon!
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