81427958640

Names of 81427958640

• Cardinal: 81427958640 can be written as Eighty-one billion, four hundred twenty-seven million, nine hundred fifty-eight thousand, six hundred forty.

Scientific notation

• Scientific notation: 8.142795864 × 10¹⁰

Factors of 81427958640

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 3945

Divisors of 81427958640

• Number of divisors d(n): 640
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 17 18 20 21 24 27 28 30 34 35 36 40 42 45 48 51 54 56 60 63 68 70 72 80 81 84 85 90 102 105 108 112 119 120 126 135 136 140 144 153 162 168 170 180 189 204 210 216 238 240 243 252 255 270 272 280 306 315 324 336 340 357 360 378 405 408 420 432 459 476 486 504 510 540 560 567 595 612 630 648 680 714 720 729 756 765 810 816 840 918 945 952 972 1008 1020 1071 1080 1134 1190 1215 1224 1260 1296 1360 1377 1428 1458 1512 1530 1620 1680 1701 1785 1836 1890 1904 1944 2040 2142 2160 2187 2268 2295 2380 2430 2448 2520 2754 2835 2856 2916 3024 3060 3213 3240 3402 3570 3645 3672 3780 3888 3911 4080 4131 4284 4374 4536 4590 4760 4860 5040 5103 5355 5508 5670 5712 5832 6120 6426 6480 6804 6885 7140 7290 7344 7560 7822 8262 8505 8568 8748 9072 9180 9520 9639 9720 10206 10710 10935 11016 11340 11664 11733 12240 12393 12852 13608 13770 14280 14580 15120 15309 15644 16065 16524 17010 17136 17496 18360 19278 19440 19555 20412 20655 21420 21870 22032 22680 23466 24786 25515 25704 27216 27377 27540 28560 28917 29160 30618 31288 32130 33048 34020 34992 35199 36720 37179 38556 39110 40824 41310 42840 43740 45360 46932 48195 49572 51030 51408 54754 55080 57834 58320 58665 61236 61965 62576 64260 66096 66487 68040 70398 74358 76545 77112 78220 81648 82131 82620 85680 86751 87480 93864 96390 99144 102060 105597 109508 110160 115668 117330 122472 123930 128520 132974 136080 136885 140796 144585 148716 153090 154224 156440 164262 165240 173502 174960 175995 185895 187728 192780 198288 199461 204120 211194 219016 231336 234660 244944 246393 247860 257040 260253 265948 273770 281592 289170 297432 306180 312880 316791 328524 330480 332435 347004 351990 371790 385560 398922 408240 410655 422388 433755 438032 462672 465409 469320 492786 495720 520506 527985 531896 547540 563184 578340 594864 598383 612360 633582 657048 664870 694008 703980 739179 743580 771120 797844 821310 844776 867510 930818 938640 950373 985572 991440 997305 1041012 1055970 1063792 1095080 1156680 1196766 1224720 1231965 1267164 1301265 1314096 1329740 1388016 1396227 1407960 1478358 1487160 1583955 1595688 1642620 1689552 1735020 1795149 1861636 1900746 1971144 1994610 2082024 2111940 2190160 2217537 2313360 2327045 2393532 2463930 2534328 2602530 2659480 2792454 2815920 2851119 2956716 2974320 2991915 3167910 3191376 3285240 3470040 3590298 3695895 3723272 3801492 3942288 3989220 4164048 4188681 4223880 4435074 4654090 4751865 4787064 4927860 5068656 5205060 5318960 5385447 5584908 5702238 5913432 5983830 6335820 6570480 6652611 6940080 6981135 7180596 7391790 7446544 7602984 7978440 8377362 8447760 8553357 8870148 8975745 9308180 9503730 9574128 9855720 10410120 10770894 11087685 11169816 11404476 11826864 11967660 12566043 12671640 13305222 13962270 14255595 14361192 14783580 15205968 15956880 16156341 16754724 17106714 17740296 17951490 18616360 19007460 19711440 19957833 20820240 20943405 21541788 22175370 22339632 22808952 23935320 25132086 25343280 26610444 26927235 27924540 28511190 28722384 29567160 32312682 33263055 33509448 34213428 35480592 35902980 37232720 37698129 38014920 39915666 41886810 42766785 43083576 44350740 45617904 47870640 48469023 50264172 53220888 53854470 55849080 57022380 59134320 59873499 62830215 64625364 66526110 67018896 68426856 71805960 75396258 76029840 79831332 80781705 83773620 85533570 86167152 88701480 96938046 99789165 100528344 106441776 107708940 111698160 113094387 114044760 119746998 125660430 129250728 133052220 136853712 143611920 145407069 150792516 159662664 161563410 167547240 171067140 177402960 188490645 193876092 199578330 201056688 215417880 226188774 228089520 239493996 242345115 251320860 258501456 266104440 290814138 299367495 301585032 319325328 323126820 335094480 339283161 342134280 376981290 387752184 399156660 430835760 452377548 478987992 484690230 502641720 532208880 565471935 581628276 598734990 603170064 646253640 678566322 684268560 727035345 753962580 775504368 798313320 904755096 957975984 969380460 1005283440 1017849483 1130943870 1163256552 1197469980 1292507280 1357132644 1454070690 1507925160 1596626640 1696415805 1809510192 1938760920 2035698966 2261887740 2326513104 2394939960 2714265288 2908141380 3015850320 3392831610 3877521840 4071397932 4523775480 4789879920 5089247415 5428530576 5816282760 6785663220 8142795864 9047550960 10178494830 11632565520 13571326440 16285591728 20356989660 27142652880 40713979320 81427958640
• Sum of all divisors σ(n): 343675146240
• Sum of proper divisors (its aliquot sum) s(n): 262247187600
• 81427958640 is an abundant number, because the sum of its proper divisors (262247187600) is greater than itself. Its abundance is 180819228960

Bases of 81427958640

• Binary: 1001011110101011111000000101101110000₂
• Hexadecimal: 0x12F57C0B70
• Base-36: 11EO3R00

Squares and roots of 81427958640

• 81427958640 squared (81427958640²) is 6630512448277550649600
• 81427958640 cubed (81427958640³) is 539909093400349533536133932544000
• The square root of 81427958640 is 285355.8456383889
• The cube root of 81427958640 is 4334.3553692383

Scales and comparisons

• 81,427,958,640 seconds is equal to 2,589 years, 8 weeks, 1 day, 5 hours, 24 minutes.
• To count from 1 to 81,427,958,640 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 81427958640 cubic inches would be around 361.2 feet tall.

Recreational maths with 81427958640

• 81427958640 backwards is 04685972418
• 81427958640 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81427958640's digits is 54
• More coming soon!