81028863504240

Names of 81028863504240

• Cardinal: 81028863504240 can be written as Eighty-one trillion, twenty-eight billion, eight hundred sixty-three million, five hundred four thousand, two hundred forty.

Scientific notation

• Scientific notation: 8.102886350424 × 10¹³

Factors of 81028863504240

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 2662

Divisors of 81028863504240

• Number of divisors d(n): 180
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 120 240 241 482 723 964 1205 1446 1928 2410 2411 2892 3615 3856 4820 4822 5784 7230 7233 9640 9644 11568 12055 14460 14466 19280 19288 24110 28920 28932 36165 38576 48220 57840 57864 58081 72330 96440 115728 116162 144660 174243 192880 232324 289320 290405 348486 464648 578640 580810 581051 696972 871215 929296 1161620 1162102 1393944 1742430 1743153 2323240 2324204 2787888 2905255 3484860 3486306 4646480 4648408 5810510 5812921 6969720 6972612 8715765 9296816 11621020 11625842 13939440 13945224 17431530 17438763 23242040 23251684 27890448 29064605 34863060 34877526 46484080 46503368 58129210 69726120 69755052 87193815 93006736 116258420 139452240 139510104 140033291 174387630 232516840 279020208 280066582 348775260 420099873 465033680 560133164 697550520 700166455 840199746 1120266328 1395101040 1400332910 1400913961 1680399492 2100499365 2240532656 2800665820 2801827922 3360798984 4200998730 4202741883 5601331640 5603655844 6721597968 7004569805 8401997460 8405483766 11202663280 11207311688 14009139610 16803994920 16810967532 21013709415 22414623376 28018279220 33607989840 33621935064 42027418830 56036558440 67243870128 84054837660 112073116880 168109675320 336219350640 337620264601 675240529202 1012860793803 1350481058404 1688101323005 2025721587606 2700962116808 3376202646010 4051443175212 5064303969015 5401924233616 6752405292020 8102886350424 10128607938030 13504810584040 16205772700848 20257215876060 27009621168080 40514431752120 81028863504240
• Sum of all divisors σ(n): 252340743919896
• Sum of proper divisors (its aliquot sum) s(n): 171311880415656
• 81028863504240 is an abundant number, because the sum of its proper divisors (171311880415656) is greater than itself. Its abundance is 90283016911416

Bases of 81028863504240

• Binary: 10010011011001000000000101000000010111101110000₂
• Hexadecimal: 0x49B200A02F70
• Base-36: SQ05986EO

Squares and roots of 81028863504240

• 81028863504240 squared (81028863504240²) is 6565676720788757012497977600
• 81028863504240 cubed (81028863504240³) is 532009322821758273596510750709449025024000
• The square root of 81028863504240 is 9001603.3851886633
• The cube root of 81028863504240 is 43272.6258046487

Scales and comparisons

• 81,028,863,504,240 seconds is equal to 2,576,467 years, 11 weeks, 3 days, 8 hours, 4 minutes.
• To count from 1 to 81,028,863,504,240 would take you about six million, four hundred forty-one thousand, one hundred sixty-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 81028863504240 cubic inches would be around 3606.1 feet tall.

Recreational maths with 81028863504240

• 81028863504240 backwards is 04240536882018
• The number of decimal digits it has is: 14
• The sum of 81028863504240's digits is 51
• More coming soon!