81264876840

Names of 81264876840

• Cardinal: 81264876840 can be written as Eighty-one billion, two hundred sixty-four million, eight hundred seventy-six thousand, eight hundred forty.

Scientific notation

• Scientific notation: 8.126487684 × 10¹⁰

Factors of 81264876840

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 8366

Divisors of 81264876840

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 28 30 31 35 36 40 42 45 56 60 62 63 70 72 84 90 93 105 120 124 126 127 140 155 168 180 186 210 217 248 252 254 279 280 310 315 360 372 381 420 434 465 504 508 558 620 630 635 651 744 762 840 868 889 930 1016 1085 1116 1143 1240 1260 1270 1302 1395 1524 1736 1778 1860 1905 1953 2170 2232 2286 2520 2540 2604 2667 2790 3048 3255 3556 3720 3810 3906 3937 4340 4445 4572 5080 5208 5334 5580 5715 6510 7112 7620 7812 7874 8001 8191 8680 8890 9144 9765 10668 11160 11430 11811 13020 13335 15240 15624 15748 16002 16382 17780 19530 19685 21336 22860 23622 24573 26040 26670 27559 31496 32004 32764 35433 35560 39060 39370 40005 40955 45720 47244 49146 53340 55118 57337 59055 64008 65528 70866 73719 78120 78740 80010 81910 82677 94488 98292 106680 110236 114674 118110 122865 137795 141732 147438 157480 160020 163820 165354 172011 177165 196584 220472 229348 236220 245730 248031 253921 275590 283464 286685 294876 320040 327640 330708 344022 354330 368595 413385 458696 472440 491460 496062 507842 516033 551180 573370 589752 661416 688044 708660 737190 761763 826770 860055 982920 992124 1015684 1032066 1040257 1102360 1146740 1240155 1269605 1376088 1417320 1474380 1523526 1653540 1720110 1777447 1984248 2031368 2064132 2080514 2285289 2293480 2480310 2539210 2580165 2948760 3047052 3120771 3307080 3440220 3554894 3808815 4128264 4161028 4570578 4960620 5078420 5160330 5201285 5332341 6094104 6241542 6880440 7109788 7281799 7617630 8322056 8887235 9141156 9362313 9921240 10156840 10320660 10402570 10664682 11426445 12483084 14219576 14563598 15235260 15603855 15997023 17774470 18282312 18724626 20641320 20805140 21329364 21845397 22852890 24966168 26661705 29127196 30470520 31207710 31994046 32247967 35548940 36408995 37449252 41610280 42658728 43690794 45705780 46811565 53323410 58254392 62415420 63988092 64495934 65536191 71097880 72817990 74898504 79985115 87381588 91411560 93623130 96743901 106646820 109226985 124830840 127976184 128991868 131072382 145635980 159970230 161239835 174763176 187246260 193487802 213293640 218453970 225735769 257983736 262144764 290231703 291271960 319940460 322479670 327680955 374492520 386975604 436907940 451471538 483719505 524289528 580463406 639880920 644959340 655361910 677207307 773951208 873815880 902943076 967439010 1128678845 1160926812 1289918680 1310723820 1354414614 1451158515 1805886152 1934878020 2031621921 2257357690 2321853624 2621447640 2708829228 2902317030 3386036535 3869756040 4063243842 4514715380 5417658456 5804634060 6772073070 8126487684 9029430760 10158109605 11609268120 13544146140 16252975368 20316219210 27088292280 40632438420 81264876840
• Sum of all divisors σ(n): 314069483520
• Sum of proper divisors (its aliquot sum) s(n): 232804606680
• 81264876840 is an abundant number, because the sum of its proper divisors (232804606680) is greater than itself. Its abundance is 151539729840

Bases of 81264876840

• Binary: 1001011101011110000111001110100101000₂
• Hexadecimal: 0x12EBC39D28
• Base-36: 11BZ0CA0

Squares and roots of 81264876840

• 81264876840 squared (81264876840²) is 6603980207820368385600
• 81264876840 cubed (81264876840³) is 536671638242319841699213629504000
• The square root of 81264876840 is 285069.9507840137
• The cube root of 81264876840 is 4331.4598572507

Scales and comparisons

• 81,264,876,840 seconds is equal to 2,583 years, 50 weeks, 3 days, 16 hours, 54 minutes.
• To count from 1 to 81,264,876,840 would take you about five thousand, one hundred sixty-seven 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 81264876840 cubic inches would be around 361 feet tall.

Recreational maths with 81264876840

• 81264876840 backwards is 04867846218
• The number of decimal digits it has is: 11
• The sum of 81264876840's digits is 54
• More coming soon!