81985947120

Names of 81985947120

• Cardinal: 81985947120 can be written as Eighty-one billion, nine hundred eighty-five million, nine hundred forty-seven thousand, one hundred twenty.

Scientific notation

• Scientific notation: 8.198594712 × 10¹⁰

Factors of 81985947120

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 8170

Divisors of 81985947120

• Number of divisors d(n): 640
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 11 12 14 15 16 18 20 21 22 24 27 28 30 33 35 36 40 42 44 45 48 54 55 56 60 61 63 66 70 72 77 80 84 88 90 99 105 108 110 112 120 122 126 132 135 140 144 154 165 168 176 180 183 189 198 210 216 220 231 240 244 252 264 270 280 297 305 308 315 330 336 360 366 378 385 396 420 427 432 440 462 488 495 504 528 540 549 560 594 610 616 630 660 671 693 720 732 756 770 792 840 854 880 915 924 945 976 990 1008 1080 1098 1155 1188 1220 1232 1260 1281 1320 1342 1386 1464 1485 1512 1540 1584 1647 1680 1708 1830 1848 1890 1980 2013 2079 2135 2160 2196 2310 2376 2440 2520 2562 2640 2684 2745 2772 2928 2970 3024 3080 3294 3355 3416 3465 3660 3696 3780 3843 3960 4026 4158 4270 4392 4620 4697 4752 4880 5040 5124 5368 5490 5544 5940 6039 6160 6405 6588 6710 6832 6930 7320 7560 7686 7920 8052 8081 8235 8316 8540 8784 9240 9394 10065 10248 10395 10736 10980 11088 11529 11880 12078 12810 13176 13420 13860 14091 14640 15120 15372 16104 16162 16470 16632 17080 18117 18480 18788 19215 20130 20496 20790 21960 23058 23485 23760 24156 24243 25620 26352 26840 27720 28182 30195 30744 32208 32324 32940 33264 34160 36234 37576 38430 40260 40405 41580 42273 43920 46116 46970 48312 48486 51240 53680 55440 56364 56567 57645 60390 61488 64648 65880 70455 72468 72729 75152 76860 80520 80810 83160 84546 88891 90585 92232 93940 96624 96972 102480 112728 113134 115290 120780 121215 126819 129296 131760 140910 144936 145458 153720 161040 161620 166320 169092 169701 177782 181170 184464 187880 193944 211365 218187 225456 226268 230580 241560 242430 253638 266673 281820 282835 289872 290916 307440 323240 338184 339402 355564 362340 363645 375760 387888 422730 436374 444455 452536 461160 483120 484860 492941 507276 509103 533346 563640 565670 581832 622237 634095 646480 676368 678804 711128 724680 727290 800019 845460 848505 872748 888910 905072 922320 969720 985882 1014552 1018206 1066692 1090935 1127280 1131340 1163664 1244474 1268190 1333365 1357608 1422256 1449360 1454580 1478823 1527309 1600038 1690920 1697010 1745496 1777820 1866711 1939440 1971764 2029104 2036412 2133384 2181870 2262680 2400057 2464705 2488948 2536380 2545515 2666730 2715216 2909160 2957646 3054618 3111185 3200076 3381840 3394020 3450587 3490992 3555640 3733422 3943528 4000095 4072824 4266768 4363740 4436469 4525360 4800114 4929410 4977896 5072760 5091030 5333460 5422351 5600133 5818320 5915292 6109236 6222370 6400152 6788040 6901174 7111280 7394115 7466844 7636545 7887056 8000190 8145648 8727480 8872938 9333555 9600228 9858820 9955792 10145520 10182060 10351761 10666920 10844702 11200266 11830584 12000285 12218472 12444740 12800304 13309407 13576080 13802348 14788230 14933688 15273090 16000380 16267053 16800399 17252935 17454960 17745876 18667110 19200456 19717640 20364120 20703522 21333840 21689404 22182345 22400532 23661168 24000570 24436944 24889480 26618814 27111755 27604696 28000665 29576460 29867376 30546180 31055283 32000760 32534106 33600798 34505870 35491752 37334220 37956457 38400912 39435280 40728240 41407044 43378808 44364690 44801064 48001140 48801159 49778960 51758805 53237628 54223510 55209392 56001330 59152920 61092360 62110566 64001520 65068212 66547035 67201596 69011740 70983504 74668440 75912914 81335265 82814088 84001995 86757616 88729380 89602128 93165849 96002280 97602318 103517610 106475256 108447020 112002660 113869371 118305840 122184720 124221132 130136424 133094070 134403192 138023480 146403477 149336880 151825828 155276415 162670530 165628176 168003990 177458760 186331698 189782285 192004560 195204636 207035220 212950512 216894040 224005320 227738742 244005795 248442264 260272848 266188140 268806384 276046960 292806954 303651656 310552830 325341060 336007980 341608113 354917520 372663396 379564570 390409272 414070440 433788080 448010640 455477484 465829245 488011590 496884528 532376280 569346855 585613908 607303312 621105660 650682120 672015960 683216226 732017385 745326792 759129140 780818544 828140880 910954968 931658490 976023180 1024824339 1064752560 1138693710 1171227816 1242211320 1301364240 1344031920 1366432452 1464034770 1490653584 1518258280 1708040565 1821909936 1863316980 1952046360 2049648678 2277387420 2342455632 2484422640 2732864904 2928069540 3036516560 3416081130 3726633960 3904092720 4099297356 4554774840 5124121695 5465729808 5856139080 6832162260 7453267920 8198594712 9109549680 10248243390 11712278160 13664324520 16397189424 20496486780 27328649040 40992973560 81985947120
• Sum of all divisors σ(n): 357894236160
• Sum of proper divisors (its aliquot sum) s(n): 275908289040
• 81985947120 is an abundant number, because the sum of its proper divisors (275908289040) is greater than itself. Its abundance is 193922341920

Bases of 81985947120

• Binary: 1001100010110101111100100010111110000₂
• Hexadecimal: 0x1316BE45F0
• Base-36: 11NWBDO0

Squares and roots of 81985947120

• 81985947120 squared (81985947120²) is 6721695525163436294400
• 81985947120 cubed (81985947120³) is 551084573882790117390167152128000
• The square root of 81985947120 is 286331.8828213161
• The cube root of 81985947120 is 4344.2332907891

Scales and comparisons

• 81,985,947,120 seconds is equal to 2,606 years, 46 weeks, 5 days, 10 hours, 12 minutes.
• To count from 1 to 81,985,947,120 would take you about five thousand, two hundred thirteen 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 81985947120 cubic inches would be around 362 feet tall.

Recreational maths with 81985947120

• 81985947120 backwards is 02174958918
• 81985947120 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81985947120's digits is 54
• More coming soon!