81135764320

Names of 81135764320

• Cardinal: 81135764320 can be written as Eighty-one billion, one hundred thirty-five million, seven hundred sixty-four thousand, three hundred twenty.

Scientific notation

• Scientific notation: 8.113576432 × 10¹⁰

Factors of 81135764320

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 2345

Divisors of 81135764320

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 26 31 32 40 43 52 62 65 80 86 104 124 130 155 160 169 172 208 215 248 260 310 338 344 403 416 430 496 520 559 620 676 688 806 845 860 992 1040 1118 1240 1333 1352 1376 1612 1690 1720 2015 2080 2236 2251 2480 2666 2704 2795 3224 3380 3440 4030 4472 4502 4960 5239 5332 5408 5590 6448 6665 6760 6880 7267 8060 8944 9004 10478 10664 11180 11255 12896 13330 13520 14534 16120 17329 17888 18008 20956 21328 22360 22510 26195 26660 27040 29068 29263 32240 34658 36016 36335 41912 42656 44720 45020 52390 53320 58136 58526 64480 69316 69781 72032 72670 83824 86645 89440 90040 96793 104780 106640 116272 117052 138632 139562 145340 146315 167648 173290 180080 193586 209560 213280 225277 232544 234104 277264 279124 290680 292630 346580 348905 360160 380419 387172 419120 450554 468208 483965 554528 558248 581360 585260 693160 697810 760838 774344 838240 901108 907153 936416 967930 1116496 1126385 1162720 1170520 1258309 1386320 1395620 1521676 1548688 1802216 1814306 1902095 1935860 2232992 2252770 2341040 2516618 2772640 2791240 3000583 3043352 3097376 3604432 3628612 3804190 3871720 4505540 4535765 4682080 5033236 5582480 6001166 6086704 6291545 7208864 7257224 7608380 7743440 9011080 9071530 10066472 11164960 11792989 12002332 12173408 12583090 14514448 15002915 15216760 15486880 16358017 18022160 18143060 20132944 23585978 24004664 25166180 29028896 30005830 30433520 32716034 36044320 36286120 39007579 40265888 47171956 48009328 50332360 58964945 60011660 60867040 65432068 72572240 78015158 81790085 94343912 96018656 100664720 117929890 120023320 130864136 145144480 156030316 163580170 188687824 195037895 201329440 235859780 240046640 261728272 312060632 327160340 377375648 390075790 471719560 480093280 507098527 523456544 624121264 654320680 780151580 943439120 1014197054 1248242528 1308641360 1560303160 1886878240 2028394108 2535492635 2617282720 3120606320 4056788216 5070985270 6241212640 8113576432 10141970540 16227152864 20283941080 40567882160 81135764320
• Sum of all divisors σ(n): 219338025984
• Sum of proper divisors (its aliquot sum) s(n): 138202261664
• 81135764320 is an abundant number, because the sum of its proper divisors (138202261664) is greater than itself. Its abundance is 57066497344

Bases of 81135764320

• Binary: 1001011100100000100011000001101100000₂
• Hexadecimal: 0x12E4118360
• Base-36: 119U50F4

Squares and roots of 81135764320

• 81135764320 squared (81135764320²) is 6583012251790585062400
• 81135764320 cubed (81135764320³) is 534117730576953407617798893568000
• The square root of 81135764320 is 284843.4031533819
• The cube root of 81135764320 is 4329.1647200201

Scales and comparisons

• 81,135,764,320 seconds is equal to 2,579 years, 45 weeks, 8 hours, 18 minutes, 40 seconds.
• To count from 1 to 81,135,764,320 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 81135764320 cubic inches would be around 360.8 feet tall.

Recreational maths with 81135764320

• 81135764320 backwards is 02346753118
• 81135764320 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81135764320's digits is 40
• More coming soon!