81006385824

Names of 81006385824

• Cardinal: 81006385824 can be written as Eighty-one billion, six million, three hundred eighty-five thousand, eight hundred twenty-four.

Scientific notation

• Scientific notation: 8.1006385824 × 10¹⁰

Factors of 81006385824

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 126

Divisors of 81006385824

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 13 14 16 18 21 24 26 27 28 32 36 39 42 48 52 54 56 63 72 78 84 91 96 101 104 108 112 117 126 144 156 168 182 189 202 208 216 224 234 252 273 288 303 312 336 351 364 378 404 416 432 468 504 546 606 624 672 702 707 728 756 808 819 864 909 936 1008 1092 1212 1248 1313 1404 1414 1456 1512 1616 1638 1818 1872 2016 2121 2184 2424 2457 2626 2727 2808 2828 2912 3024 3232 3276 3636 3744 3939 4242 4368 4848 4914 5252 5454 5616 5656 6048 6363 6552 7272 7878 8484 8736 9191 9696 9828 10201 10504 10908 11232 11312 11817 12726 13104 14544 15756 16968 18382 19089 19656 20402 21008 21816 22624 23634 25452 26208 27573 29088 30603 31512 33936 35451 36764 38178 39312 40804 42016 43632 47268 50904 55146 61206 63024 67872 70902 71407 73528 76356 78624 81608 82719 87264 91809 94536 101808 110292 122412 126048 132613 141804 142814 147056 152712 163216 165438 183618 189072 203616 214221 220584 244824 248157 265226 275427 283608 285628 294112 305424 326432 330876 367236 378144 397839 428442 441168 489648 496314 530452 550854 567216 571256 610848 642663 661752 734472 795678 856884 882336 928291 979296 992628 1030301 1060904 1101708 1134432 1142512 1193517 1285326 1323504 1468944 1591356 1713768 1856582 1927989 1985256 2060602 2121808 2203416 2285024 2387034 2570652 2647008 2784873 2937888 3090903 3182712 3427536 3580551 3713164 3855978 3970512 4121204 4243616 4406832 4774068 5141304 5569746 6181806 6365424 6855072 7161102 7212107 7426328 7711956 7941024 8242408 8354619 8813664 9272709 9548136 10282608 11139492 12363612 12730848 13393913 14322204 14424214 14852656 15423912 16484816 16709238 18545418 19096272 20565216 21636321 22278984 24727224 25063857 26787826 27818127 28644408 28848428 29705312 30847824 32969632 33418476 37090836 38192544 40181739 43272642 44557968 49454448 50127714 53575652 55636254 57288816 57696856 61695648 64908963 66836952 74181672 80363478 86545284 89115936 93757391 98908896 100255428 107151304 111272508 114577632 115393712 120545217 129817926 133673904 148363344 160726956 173090568 187514782 194726889 200510856 214302608 222545016 230787424 241090434 259635852 267347808 281272173 296726688 321453912 346181136 361635651 375029564 389453778 401021712 428605216 445090032 482180868 519271704 562544346 642907824 692362272 723271302 750059128 778907556 802043424 843816519 890180064 964361736 1038543408 1125088692 1285815648 1446542604 1500118256 1557815112 1687633038 1928723472 2077086816 2250177384 2531449557 2893085208 3000236512 3115630224 3375266076 3857446944 4500354768 5062899114 5786170416 6231260448 6750532152 9000709536 10125798228 11572340832 13501064304 20251596456 27002128608 40503192912 81006385824
• Sum of all divisors σ(n): 293700072960
• Sum of proper divisors (its aliquot sum) s(n): 212693687136
• 81006385824 is an abundant number, because the sum of its proper divisors (212693687136) is greater than itself. Its abundance is 131687301312

Bases of 81006385824

• Binary: 1001011011100010110110101101010100000₂
• Hexadecimal: 0x12DC5B5AA0
• Base-36: 117P3ZC0

Squares and roots of 81006385824

• 81006385824 squared (81006385824²) is 6562034544266748158976
• 81006385824 cubed (81006385824³) is 531566702083288208539851544756224
• The square root of 81006385824 is 284616.2079432583
• The cube root of 81006385824 is 4326.8624110445

Scales and comparisons

• 81,006,385,824 seconds is equal to 2,575 years, 39 weeks, 21 hours, 50 minutes, 24 seconds.
• To count from 1 to 81,006,385,824 would take you about five thousand, one hundred fifty-one 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 81006385824 cubic inches would be around 360.6 feet tall.

Recreational maths with 81006385824

• 81006385824 backwards is 42858360018
• The number of decimal digits it has is: 11
• The sum of 81006385824's digits is 45
• More coming soon!