155197997871

Names of 155197997871

• Cardinal: 155197997871 can be written as One hundred fifty-five billion, one hundred ninety-seven million, nine hundred ninety-seven thousand, eight hundred seventy-one.

Scientific notation

• Scientific notation: 1.55197997871 × 10¹¹

Factors of 155197997871

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 207

Divisors of 155197997871

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 7 21 29 37 49 87 111 131 147 203 259 343 393 609 777 841 917 1029 1073 1369 1421 1813 2523 2751 3219 3799 4107 4263 4847 5439 5887 6419 7511 9583 9947 11397 12691 14541 17661 19257 22533 26593 28749 29841 31117 33929 38073 39701 41209 44933 52577 67081 79779 93351 101787 110171 119103 123627 134799 140563 157731 179339 186151 201243 217819 237503 277907 288463 330513 368039 421689 469567 538017 558453 653457 712509 771197 833721 865389 983941 1104117 1151329 1255373 1303057 1408701 1524733 1662521 1945349 2313591 2951823 3453987 3766119 3909171 4076327 4574199 4987563 5200831 5398379 5836047 6887587 8059303 8787611 10673131 12228981 13617443 15602493 16195137 20662761 24177909 26362833 28534289 32019393 36405817 37788653 40852329 48213109 56415121 61513277 85602867 109217451 113365959 144639327 150824099 169245363 184539831 199740023 254840719 394905847 452472297 599220069 764522157 1055768693 1184717541 1398180161 1783885033 3167306079 4194540483 5351655099 7390380851 22171142553 51732665957 155197997871
• Sum of all divisors σ(n): 258824966400
• Sum of proper divisors (its aliquot sum) s(n): 103626968529
• 155197997871 is a deficient number, because the sum of its proper divisors (103626968529) is less than itself. Its deficiency is 51571029342

Bases of 155197997871

• Binary: 10010000100010100001011000001100101111₂
• Hexadecimal: 0x242285832F
• Base-36: 1ZAOVPKF

Squares and roots of 155197997871

• 155197997871 squared (155197997871²) is 24086418543166920532641
• 155197997871 cubed (155197997871³) is 3738163933782434654422444104007311
• The square root of 155197997871 is 393951.7709961461
• The cube root of 155197997871 is 5373.9716553959

Scales and comparisons

• 155,197,997,871 seconds is equal to 4,934 years, 42 weeks, 3 days, 2 hours, 57 minutes, 51 seconds.
• To count from 1 to 155,197,997,871 would take you about nine thousand, eight hundred sixty-nine 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 155197997871 cubic inches would be around 447.8 feet tall.

Recreational maths with 155197997871

• 155197997871 backwards is 178799791551
• The number of decimal digits it has is: 12
• The sum of 155197997871's digits is 69
• More coming soon!