81021128947362

Names of 81021128947362

• Cardinal: 81021128947362 can be written as Eighty-one trillion, twenty-one billion, one hundred twenty-eight million, nine hundred forty-seven thousand, three hundred sixty-two.

Scientific notation

• Scientific notation: 8.1021128947362 × 10¹³

Factors of 81021128947362

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 677

Divisors of 81021128947362

• Number of divisors d(n): 210
• Complete list of divisors:
  1 2 3 6 9 18 19 27 38 54 57 81 114 162 171 243 342 361 486 513 653 722 729 1026 1083 1306 1458 1539 1959 2166 3078 3249 3918 4617 5877 6498 6859 9234 9747 11754 12407 13718 13851 17631 19494 20577 24814 27702 29241 35262 37221 41154 52893 58482 61731 74442 87723 105786 111663 123462 130321 158679 175446 185193 223326 235733 260642 263169 317358 334989 370386 390963 426409 471466 476037 526338 555579 669978 707199 781926 852818 952074 1004967 1111158 1172889 1279227 1414398 1666737 2009934 2121597 2345778 2558454 3014901 3333474 3518667 3837681 4243194 4478927 5000211 6029802 6364791 7037334 7675362 8101771 8957854 9044703 10000422 10556001 11513043 12729582 13436781 16203542 18089406 19094373 21112002 23026086 24305313 26873562 31668003 34539129 38188746 40310343 48610626 57283119 63336006 69078258 72915939 80620686 85099613 95004009 103617387 114566238 120931029 145831878 153933649 170199226 171849357 190008018 207234774 218747817 241862058 255298839 307867298 310852161 343698714 362793087 437495634 461800947 510597678 621704322 656243451 725586174 765896517 923601894 1088379261 1312486902 1385402841 1531793034 1968730353 2176758522 2297689551 2770805682 2924739331 3265137783 3937460706 4156208523 4595379102 5849478662 5906191059 6530275566 6893068653 8312417046 8774217993 11812382118 12468625569 13786137306 17548435986 20679205959 24937251138 26322653979 37405876707 41358411918 52645307958 55570047289 62037617877 74811753414 78967961937 111140094578 112217630121 124075235754 157935923874 166710141867 224435260242 236903885811 333420283734 473807771622 500130425601 710711657433 1000260851202 1421423314866 1500391276803 2132134972299 3000782553606 4264269944598 4501173830409 9002347660818 13503521491227 27007042982454 40510564473681 81021128947362
• Sum of all divisors σ(n): 192632112551697
• Sum of proper divisors (its aliquot sum) s(n): 111610983604335
• 81021128947362 is an abundant number, because the sum of its proper divisors (111610983604335) is greater than itself. Its abundance is 30589854656973

Bases of 81021128947362

• Binary: 10010011011000000110011100111000011011010100010₂
• Hexadecimal: 0x49B0339C36A2
• Base-36: SPWLC9S4I

Squares and roots of 81021128947362

• 81021128947362 squared (81021128947362²) is 6564423335905060626166759044
• 81021128947362 cubed (81021128947362³) is 531856989563436133190107178775674813441928
• The square root of 81021128947362 is 9001173.7538702141
• The cube root of 81021128947362 is 43271.2489074913

Scales and comparisons

• 81,021,128,947,362 seconds is equal to 2,576,221 years, 14 weeks, 6 days, 2 minutes, 42 seconds.
• To count from 1 to 81,021,128,947,362 would take you about six million, four hundred forty thousand, five hundred fifty-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 81021128947362 cubic inches would be around 3605.9 feet tall.

Recreational maths with 81021128947362

• 81021128947362 backwards is 26374982112018
• 81021128947362 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81021128947362's digits is 54
• More coming soon!