81821585712

Names of 81821585712

• Cardinal: 81821585712 can be written as Eighty-one billion, eight hundred twenty-one million, five hundred eighty-five thousand, seven hundred twelve.

Scientific notation

• Scientific notation: 8.1821585712 × 10¹⁰

Factors of 81821585712

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 118

Divisors of 81821585712

• Number of divisors d(n): 270
• Complete list of divisors:
  1 2 3 4 6 8 12 16 19 24 38 41 48 53 57 76 82 106 114 123 152 159 164 212 228 246 304 318 328 361 424 456 492 636 656 722 779 848 912 984 1007 1083 1272 1444 1558 1681 1968 2014 2166 2173 2337 2544 2809 2888 3021 3116 3362 4028 4332 4346 4674 5043 5618 5776 6042 6232 6519 6724 8056 8427 8664 8692 9348 10086 11236 12084 12464 13038 13448 14801 16112 16854 17328 17384 18696 19133 20172 22472 24168 26076 26896 29602 31939 33708 34768 37392 38266 40344 41287 44403 44944 48336 52152 53371 57399 59204 63878 67416 76532 80688 82574 88806 89093 95817 104304 106742 114798 115169 118408 123861 127756 134832 153064 160113 165148 177612 178186 191634 213484 229596 230338 236816 247722 255512 267279 306128 320226 330296 345507 355224 356372 383268 426968 459192 460676 495444 511024 534558 606841 640452 660592 691014 710448 712744 766536 784453 853936 918384 921352 990888 1014049 1069116 1213682 1280904 1382028 1425488 1533072 1568906 1692767 1820523 1842704 1981776 2028098 2138232 2188211 2353359 2427364 2561808 2764056 3042147 3137812 3385534 3641046 4056196 4276464 4376422 4706718 4721929 4854728 5078301 5528112 6084294 6275624 6564633 6771068 7282092 8112392 8752844 9413436 9443858 9709456 10156602 12168588 12551248 13129266 13542136 14165787 14564184 16224784 17505688 18826872 18887716 20313204 24337176 26258532 27084272 28331574 29128368 32162573 35011376 37653744 37775432 40626408 41576009 48674352 52517064 56663148 64325146 75550864 81252816 83152018 89716651 96487719 105034128 113326296 124728027 128650292 166304036 179433302 192975438 226652592 249456054 257300584 269149953 332608072 358866604 385950876 498912108 514601168 538299906 665216144 717733208 771901752 997824216 1076599812 1435466416 1543803504 1704616369 1995648432 2153199624 3409232738 4306399248 5113849107 6818465476 10227698214 13636930952 20455396428 27273861904 40910792856 81821585712
• Sum of all divisors σ(n): 233052242556
• Sum of proper divisors (its aliquot sum) s(n): 151230656844
• 81821585712 is an abundant number, because the sum of its proper divisors (151230656844) is greater than itself. Its abundance is 69409071132

Bases of 81821585712

• Binary: 1001100001100111100100101000100110000₂
• Hexadecimal: 0x130CF25130
• Base-36: 11L6GJLC

Squares and roots of 81821585712

• 81821585712 squared (81821585712²) is 6694771888426162546944
• 81821585712 cubed (81821585712³) is 547776851891149359618022719664128
• The square root of 81821585712 is 286044.7267683849
• The cube root of 81821585712 is 4341.3283133527

Scales and comparisons

• 81,821,585,712 seconds is equal to 2,601 years, 35 weeks, 2 hours, 15 minutes, 12 seconds.
• To count from 1 to 81,821,585,712 would take you about five thousand, two hundred three 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 81821585712 cubic inches would be around 361.8 feet tall.

Recreational maths with 81821585712

• 81821585712 backwards is 21758512818
• 81821585712 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81821585712's digits is 48
• More coming soon!