161821383906

Names of 161821383906

• Cardinal: 161821383906 can be written as One hundred sixty-one billion, eight hundred twenty-one million, three hundred eighty-three thousand, nine hundred six.

Scientific notation

• Scientific notation: 1.61821383906 × 10¹¹

Factors of 161821383906

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 2816

Divisors of 161821383906

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 6 7 13 14 21 26 39 42 78 91 173 182 273 346 519 546 1038 1211 1291 1327 2249 2422 2582 2654 3633 3873 3981 4498 6747 7266 7746 7962 9037 9289 13494 15743 16783 17251 18074 18578 27111 27867 31486 33566 34502 47229 50349 51753 54222 55734 94458 100698 103506 117481 120757 223343 229571 234962 241514 352443 362271 446686 459142 670029 688713 704886 724542 1340058 1377426 1563401 1606997 1713157 2903459 2984423 3126802 3213994 3426314 4690203 4820991 5139471 5806918 5968846 8710377 8953269 9380406 9641982 10278942 11992099 17420754 17906538 20324213 20890961 22271041 23984198 35976297 40648426 41781922 44542082 60972639 62672883 66813123 71952594 121945278 125345766 133626246 155897287 296376161 311794574 467691861 592752322 889128483 935383722 1778256966 2074633127 3852890093 4149266254 6223899381 7705780186 11558670279 12447798762 23117340558 26970230651 53940461302 80910691953 161821383906
• Sum of all divisors σ(n): 401244512256
• Sum of proper divisors (its aliquot sum) s(n): 239423128350
• 161821383906 is an abundant number, because the sum of its proper divisors (239423128350) is greater than itself. Its abundance is 77601744444

Bases of 161821383906

• Binary: 10010110101101010011100101110011100010₂
• Hexadecimal: 0x25AD4E5CE2
• Base-36: 22C89UXU

Squares and roots of 161821383906

• 161821383906 squared (161821383906²) is 26186160289253035816836
• 161821383906 cubed (161821383906³) is 4237480697191267514892186654241416
• The square root of 161821383906 is 402270.2871279457
• The cube root of 161821383906 is 5449.3575418205

Scales and comparisons

• 161,821,383,906 seconds is equal to 5,145 years, 21 weeks, 5 days, 16 hours, 25 minutes, 6 seconds.
• To count from 1 to 161,821,383,906 would take you about ten thousand, two hundred ninety 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 161821383906 cubic inches would be around 454.1 feet tall.

Recreational maths with 161821383906

• 161821383906 backwards is 609383128161
• The number of decimal digits it has is: 12
• The sum of 161821383906's digits is 48
• More coming soon!