81428731147449

Names of 81428731147449

• Cardinal: 81428731147449 can be written as Eighty-one trillion, four hundred twenty-eight billion, seven hundred thirty-one million, one hundred forty-seven thousand, four hundred forty-nine.

Scientific notation

• Scientific notation: 8.1428731147449 × 10¹³

Factors of 81428731147449

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 3643

Divisors of 81428731147449

• Number of divisors d(n): 288
• Complete list of divisors:
  1 3 7 9 19 21 27 57 63 73 81 133 171 189 219 243 361 399 511 513 567 657 729 1083 1197 1387 1533 1539 1701 1971 2187 2527 3249 3541 3591 4161 4599 4617 5103 5913 6561 6859 7581 9709 9747 10623 10773 12483 13797 13851 15309 17739 20577 22743 24787 26353 29127 29241 31869 32319 37449 41391 41553 45927 48013 53217 61731 67279 68229 74361 79059 87381 87723 95607 96957 112347 124173 124659 144039 159651 184471 185193 201837 204687 223083 237177 258493 262143 263169 286821 290871 337041 372519 432117 470953 478953 500707 553413 555579 605511 614061 669249 711531 775479 786429 789507 860463 872613 1011123 1117557 1278301 1296351 1412859 1502121 1660239 1666737 1809451 1816533 1842183 2007747 2134593 2326437 2359287 2368521 2581389 3033369 3352671 3504949 3834903 3889053 4238577 4506363 4911367 4980717 5000211 5428353 5449599 5526549 6023241 6403779 6979311 7077861 7744167 8948107 9100107 10514847 11504709 11667159 12715731 13519089 14734101 14942151 15000633 16285059 16348797 16579647 18069723 19211337 20937933 21233583 23232501 24287719 26844321 31544541 34379569 34514127 35001477 38147193 40557267 44202303 44826453 45001899 48855177 49046391 54209169 57634011 62813799 63700749 72863157 80532963 93315973 94633623 103138707 103542381 105004431 114441579 121671801 132606909 134479359 146565531 147139173 162627507 170014033 172902033 188441397 218589471 241598889 279947919 283900869 309416121 310627143 315013293 343324737 365015403 397820727 403438077 439696593 441417519 510042099 565324191 653211811 655768413 724796667 839843757 851702607 928248363 931881429 1029974211 1095046209 1193462181 1210314231 1319089779 1530126297 1695972573 1773003487 1959635433 1967305239 2174390001 2519531271 2555107821 2784745089 2795644287 3089922633 3285138627 3580386543 3957269337 4590378891 5319010461 5878906299 5901915717 6523170003 7558593813 7665323463 8354235267 8386932861 10741159629 11871808011 12411024409 13771136673 15957031383 17636718897 17705747151 19569510009 22675781439 22995970389 25062705801 32223478887 37233073227 41313410019 47871094149 52910156691 53117241453 58708530027 68027344317 75188117403 111699219681 123940230057 143613282447 158730470073 159351724359 204082032951 225564352209 335097659043 371820690171 430839847341 476191410219 612246098853 1005292977129 1115462070513 1292519542023 1428574230657 3015878931387 3877558626069 4285722691971 9047636794161 11632675878207 27142910382483 81428731147449
• Sum of all divisors σ(n): 149399127637760
• Sum of proper divisors (its aliquot sum) s(n): 67970396490311
• 81428731147449 is a deficient number, because the sum of its proper divisors (67970396490311) is less than itself. Its deficiency is 13458334657138

Bases of 81428731147449

• Binary: 10010100000111100011010100110000011010010111001₂
• Hexadecimal: 0x4A0F1A9834B9
• Base-36: SV3UC3IK9

Squares and roots of 81428731147449

• 81428731147449 squared (81428731147449²) is 6630638256283530936179207601
• 81428731147449 cubed (81428731147449³) is 539924459906901680583065216543672312559849
• The square root of 81428731147449 is 9023786.9626586929
• The cube root of 81428731147449 is 43343.6907587867

Scales and comparisons

• 81,428,731,147,449 seconds is equal to 2,589,181 years, 40 weeks, 2 days, 1 hour, 24 minutes, 9 seconds.
• To count from 1 to 81,428,731,147,449 would take you about six million, four hundred seventy-two thousand, nine hundred fifty-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 81428731147449 cubic inches would be around 3612 feet tall.

Recreational maths with 81428731147449

• 81428731147449 backwards is 94474113782418
• 81428731147449 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81428731147449's digits is 63
• More coming soon!