81430865472

Names of 81430865472

• Cardinal: 81430865472 can be written as Eighty-one billion, four hundred thirty million, eight hundred sixty-five thousand, four hundred seventy-two.

Scientific notation

• Scientific notation: 8.1430865472 × 10¹⁰

Factors of 81430865472

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 857

Divisors of 81430865472

• Number of divisors d(n): 336
• Complete list of divisors:
  1 2 3 4 6 8 11 12 16 22 24 31 32 33 44 48 53 62 64 66 88 93 96 106 124 132 159 176 186 192 212 248 264 318 341 352 372 424 496 528 583 636 682 704 744 757 848 961 992 1023 1056 1166 1272 1364 1488 1514 1643 1696 1749 1922 1984 2046 2112 2271 2332 2544 2728 2883 2976 3028 3286 3392 3498 3844 4092 4542 4664 4929 5088 5456 5766 5952 6056 6572 6996 7688 8184 8327 9084 9328 9858 10176 10571 10912 11532 12112 13144 13992 15376 16368 16654 18073 18168 18656 19716 21142 21824 23064 23467 24224 24981 26288 27984 30752 31713 32736 33308 36146 36336 37312 39432 40121 42284 46128 46934 48448 49962 50933 52576 54219 55968 61504 63426 65472 66616 70401 72292 72672 78864 80242 84568 92256 93868 99924 101866 105152 108438 111936 120363 126852 133232 140802 144584 145344 152799 157728 160484 169136 184512 187736 199848 203732 216876 240726 253704 258137 266464 281604 289168 305598 315456 320968 338272 375472 399696 407464 433752 441331 481452 507408 516274 532928 560263 563208 578336 611196 641936 676544 727477 750944 774411 799392 814928 867504 882662 962904 1014816 1032548 1120526 1126416 1156672 1222392 1243751 1283872 1323993 1454954 1501888 1548822 1598784 1629856 1680789 1735008 1765324 1925808 2029632 2065096 2182431 2241052 2252832 2444784 2487502 2567744 2647986 2909908 3097644 3259712 3361578 3470016 3530648 3731253 3851616 4130192 4364862 4482104 4505664 4889568 4975004 5295972 5819816 6195288 6723156 7061296 7462506 7703232 8002247 8260384 8729724 8964208 9779136 9950008 10591944 11639632 12390576 13446312 13681261 14122592 14925012 16004494 16520768 17459448 17928416 19900016 21183888 23279264 24006741 24781152 26892624 27362522 28245184 29850024 32008988 34918896 35856832 38556281 39800032 41043783 42367776 46558528 48013482 49562304 53785248 54725044 59700048 64017976 69837792 77112562 79600064 82087566 84735552 96026964 107570496 109450088 115668843 119400096 128035952 139675584 154225124 164175132 192053928 218900176 231337686 238800192 256071904 308450248 328350264 384107856 424119091 437800352 462675372 512143808 616900496 656700528 768215712 848238182 875600704 925350744 1233800992 1272357273 1313401056 1536431424 1696476364 1850701488 2467601984 2544714546 2626802112 3392952728 3701402976 5089429092 6785905456 7402805952 10178858184 13571810912 20357716368 27143621824 40715432736 81430865472
• Sum of all divisors σ(n): 247774821696
• Sum of proper divisors (its aliquot sum) s(n): 166343956224
• 81430865472 is an abundant number, because the sum of its proper divisors (166343956224) is greater than itself. Its abundance is 84913090752

Bases of 81430865472

• Binary: 1001011110101101010000110011001000000₂
• Hexadecimal: 0x12F5A86640
• Base-36: 11EPU1XC

Squares and roots of 81430865472

• 81430865472 squared (81430865472²) is 6630985851518961782784
• 81430865472 cubed (81430865472³) is 539966916821775943790993189634048
• The square root of 81430865472 is 285360.9389387413
• The cube root of 81430865472 is 4334.4069448609

Scales and comparisons

• 81,430,865,472 seconds is equal to 2,589 years, 12 weeks, 6 days, 20 hours, 51 minutes, 12 seconds.
• To count from 1 to 81,430,865,472 would take you about five thousand, one hundred seventy-eight 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 81430865472 cubic inches would be around 361.2 feet tall.

Recreational maths with 81430865472

• 81430865472 backwards is 27456803418
• 81430865472 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81430865472's digits is 48
• More coming soon!