81518137344

Names of 81518137344

• Cardinal: 81518137344 can be written as Eighty-one billion, five hundred eighteen million, one hundred thirty-seven thousand, three hundred forty-four.

Scientific notation

• Scientific notation: 8.1518137344 × 10¹⁰

Factors of 81518137344

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 20
• Sum of prime factors: 319

Divisors of 81518137344

• Number of divisors d(n): 520
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 32 36 42 48 49 54 56 63 64 72 84 96 98 108 112 126 128 144 147 168 189 192 196 216 224 252 256 288 294 307 336 343 378 384 392 432 441 448 504 512 576 588 614 672 686 756 768 784 864 882 896 921 1008 1024 1029 1152 1176 1228 1323 1344 1372 1512 1536 1568 1728 1764 1792 1842 2016 2048 2058 2149 2304 2352 2401 2456 2646 2688 2744 2763 3024 3072 3087 3136 3456 3528 3584 3684 4032 4096 4116 4298 4608 4704 4802 4912 5292 5376 5488 5526 6048 6144 6174 6272 6447 6912 7056 7168 7203 7368 8064 8232 8289 8596 9216 9261 9408 9604 9824 10584 10752 10976 11052 12096 12288 12348 12544 12894 13824 14112 14336 14406 14736 15043 16128 16464 16578 17192 18432 18522 18816 19208 19341 19648 21168 21504 21609 21952 22104 24192 24696 25088 25788 27648 28224 28672 28812 29472 30086 32256 32928 33156 34384 36864 37044 37632 38416 38682 39296 42336 43008 43218 43904 44208 45129 48384 49392 50176 51576 55296 56448 57624 58023 58944 60172 64512 64827 65856 66312 68768 74088 75264 76832 77364 78592 84672 86016 86436 87808 88416 90258 96768 98784 100352 103152 105301 110592 112896 115248 116046 117888 120344 129024 129654 131712 132624 135387 137536 148176 150528 153664 154728 157184 169344 172872 175616 176832 180516 193536 197568 200704 206304 210602 225792 230496 232092 235776 240688 258048 259308 263424 265248 270774 275072 296352 301056 307328 309456 314368 315903 338688 345744 351232 353664 361032 387072 395136 406161 412608 421204 451584 460992 464184 471552 481376 518616 526848 530496 541548 550144 592704 602112 614656 618912 628736 631806 677376 691488 702464 707328 722064 737107 774144 790272 812322 825216 842408 903168 921984 928368 943104 947709 962752 1037232 1053696 1060992 1083096 1100288 1185408 1229312 1237824 1257472 1263612 1354752 1382976 1404928 1414656 1444128 1474214 1580544 1624644 1650432 1684816 1806336 1843968 1856736 1886208 1895418 1925504 2074464 2107392 2121984 2166192 2200576 2211321 2370816 2458624 2475648 2527224 2709504 2765952 2829312 2843127 2888256 2948428 3161088 3249288 3300864 3369632 3687936 3713472 3772416 3790836 3851008 4148928 4214784 4243968 4332384 4401152 4422642 4741632 4917248 4951296 5054448 5419008 5531904 5658624 5686254 5776512 5896856 6322176 6498576 6601728 6633963 6739264 7375872 7426944 7581672 7702016 8297856 8487936 8664768 8802304 8845284 9483264 9834496 9902592 10108896 11063808 11317248 11372508 11553024 11793712 12644352 12997152 13203456 13267926 13478528 14751744 14853888 15163344 15404032 16595712 16975872 17329536 17690568 18966528 19805184 19901889 20217792 22127616 22745016 23106048 23587424 25994304 26406912 26535852 26957056 29503488 29707776 30326688 30808064 33191424 33951744 34659072 35381136 37933056 39610368 39803778 40435584 44255232 45490032 46212096 47174848 51988608 53071704 53914112 59415552 60653376 61616128 66382848 69318144 70762272 79220736 79607556 80871168 88510464 90980064 92424192 94349696 103977216 106143408 107828224 118831104 121306752 132765696 138636288 141524544 159215112 161742336 181960128 184848384 188699392 207954432 212286816 215656448 237662208 242613504 265531392 277272576 283049088 318430224 323484672 363920256 377398784 415908864 424573632 431312896 485227008 554545152 566098176 636860448 646969344 727840512 754797568 831817728 849147264 970454016 1132196352 1273720896 1293938688 1455681024 1509595136 1663635456 1698294528 1940908032 2264392704 2547441792 2911362048 3019190272 3396589056 3881816064 4528785408 5094883584 5822724096 6793178112 9057570816 10189767168 11645448192 13586356224 20379534336 27172712448 40759068672 81518137344
• Sum of all divisors σ(n): 282657649120
• Sum of proper divisors (its aliquot sum) s(n): 201139511776
• 81518137344 is an abundant number, because the sum of its proper divisors (201139511776) is greater than itself. Its abundance is 119621374432

Bases of 81518137344

• Binary: 1001011111010110111000001000000000000₂
• Hexadecimal: 0x12FADC1000
• Base-36: 11G5SLC0

Squares and roots of 81518137344

• 81518137344 squared (81518137344²) is 6645206716035247374336
• 81518137344 cubed (81518137344³) is 541704873757032502606137428803584
• The square root of 81518137344 is 285513.8128777661
• The cube root of 81518137344 is 4335.9548294833

Scales and comparisons

• 81,518,137,344 seconds is equal to 2,592 years, 1 week, 1 day, 23 hours, 2 minutes, 24 seconds.
• To count from 1 to 81,518,137,344 would take you about five thousand, one hundred eighty-four 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 81518137344 cubic inches would be around 361.3 feet tall.

Recreational maths with 81518137344

• 81518137344 backwards is 44373181518
• The number of decimal digits it has is: 11
• The sum of 81518137344's digits is 45
• More coming soon!