81988753968

Names of 81988753968

• Cardinal: 81988753968 can be written as Eighty-one billion, nine hundred eighty-eight million, seven hundred fifty-three thousand, nine hundred sixty-eight.

Scientific notation

• Scientific notation: 8.1988753968 × 10¹⁰

Factors of 81988753968

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 972

Divisors of 81988753968

• Number of divisors d(n): 270
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 16 18 22 24 33 36 44 48 66 72 73 88 99 121 132 144 146 176 198 219 242 264 292 363 396 438 484 528 584 657 726 792 803 876 883 968 1089 1168 1314 1452 1584 1606 1752 1766 1936 2178 2409 2628 2649 2904 3212 3504 3532 4356 4818 5256 5298 5329 5808 6424 7064 7227 7947 8712 8833 9636 9713 10512 10596 10658 12848 14128 14454 15894 15987 17424 17666 19272 19426 21192 21316 26499 28908 29139 31788 31974 35332 38544 38852 42384 42632 47961 52998 57816 58278 58619 63576 63948 64459 70664 77704 79497 85264 87417 95922 105996 106843 115632 116556 117238 127152 127896 128918 141328 155408 158994 174834 175857 191844 193377 211992 213686 233112 234476 255792 257836 317988 320529 349668 351714 383688 386754 423984 427372 466224 468952 515672 527571 580131 635976 641058 644809 699336 703428 709049 767376 773508 854744 937904 961587 1031344 1055142 1160262 1271952 1282116 1289618 1398672 1406856 1418098 1547016 1709488 1923174 1934427 2110284 2127147 2320524 2564232 2579236 2813712 2836196 3094032 3846348 3868854 4220568 4254294 4641048 4705507 5128464 5158472 5672392 5803281 6381441 7692696 7737708 7799539 8441136 8508588 9282096 9411014 10316944 11344784 11606562 12762882 14116521 15385392 15475416 15599078 17017176 18822028 23213124 23398617 25525764 28233042 30950832 31198156 34034352 37644056 42349563 46426248 46797234 51051528 51760577 56466084 62396312 70195851 75288112 84699126 92852496 93594468 102103056 103521154 112932168 124792624 140391702 155281731 169398252 187188936 207042308 225864336 280783404 310563462 338796504 374377872 414084616 465845193 561566808 569366347 621126924 677593008 828169232 931690386 1123133616 1138732694 1242253848 1708099041 1863380772 2277465388 2484507696 3416198082 3726761544 4554930776 5124297123 6832396164 7453523088 9109861552 10248594246 13664792328 20497188492 27329584656 40994376984 81988753968
• Sum of all divisors σ(n): 256002330948
• Sum of proper divisors (its aliquot sum) s(n): 174013576980
• 81988753968 is an abundant number, because the sum of its proper divisors (174013576980) is greater than itself. Its abundance is 92024823012

Bases of 81988753968

• Binary: 1001100010110111010010001101000110000₂
• Hexadecimal: 0x1316E91A30
• Base-36: 11NXZJG0

Squares and roots of 81988753968

• 81988753968 squared (81988753968²) is 6722155777225235745024
• 81988753968 cubed (81988753968³) is 551141176153489671219571916255232
• The square root of 81988753968 is 286336.7841685729
• The cube root of 81988753968 is 4344.2828662091

Scales and comparisons

• 81,988,753,968 seconds is equal to 2,606 years, 51 weeks, 2 days, 21 hours, 52 minutes, 48 seconds.
• To count from 1 to 81,988,753,968 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 81988753968 cubic inches would be around 362 feet tall.

Recreational maths with 81988753968

• 81988753968 backwards is 86935788918
• 81988753968 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81988753968's digits is 72
• More coming soon!