161820438990

Names of 161820438990

• Cardinal: 161820438990 can be written as One hundred sixty-one billion, eight hundred twenty million, four hundred thirty-eight thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.6182043899 × 10¹¹

Factors of 161820438990

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 3687

Divisors of 161820438990

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 5 6 7 10 14 15 19 21 30 35 38 42 53 57 70 95 105 106 114 133 159 190 210 227 265 266 285 318 371 399 454 530 570 665 681 742 795 798 1007 1113 1135 1330 1362 1589 1590 1855 1995 2014 2226 2270 3021 3178 3371 3405 3710 3990 4313 4767 5035 5565 6042 6742 6810 7049 7945 8626 9534 10070 10113 11130 12031 12939 14098 15105 15890 16855 20226 21147 21565 23597 23835 24062 25878 30191 30210 33710 35245 36093 42294 43130 47194 47670 50565 60155 60382 64049 64695 70490 70791 72186 84217 90573 101130 105735 117985 120310 128098 129390 141582 150955 168434 178663 180465 181146 192147 211470 228589 235970 252651 301910 320245 353955 357326 360930 384294 421085 448343 452865 457178 505302 535989 640490 685767 707910 765217 842170 893315 896686 905730 960735 1071978 1142945 1250641 1263255 1345029 1371534 1530434 1600123 1786630 1921470 2241715 2285890 2295651 2501282 2526510 2679945 2690058 3200246 3394597 3428835 3751923 3826085 4483430 4591302 4800369 5356519 5359890 6253205 6725145 6789194 6857670 7503846 7652170 8000615 9600738 10183791 10713038 11478255 12506410 13450290 14539123 16001230 16069557 16972985 18759615 20367582 22956510 23762179 24001845 26782595 29078246 32139114 33945970 37519230 40556501 43617369 47524358 48003690 50918955 53565190 71286537 72695615 80347785 81113002 87234738 101773861 101837910 118810895 121669503 142573074 145391230 160695570 202782505 203547722 218086845 237621790 243339006 283895507 305321583 356432685 405565010 436173690 508869305 567791014 608347515 610643166 712865370 770573519 851686521 1017738610 1216695030 1419477535 1526607915 1541147038 1703373042 2311720557 2838955070 3053215830 3852867595 4258432605 4623441114 5394014633 7705735190 8516865210 10788029266 11558602785 16182043899 23117205570 26970073165 32364087798 53940146330 80910219495 161820438990
• Sum of all divisors σ(n): 478265057280
• Sum of proper divisors (its aliquot sum) s(n): 316444618290
• 161820438990 is an abundant number, because the sum of its proper divisors (316444618290) is greater than itself. Its abundance is 154624179300

Bases of 161820438990

• Binary: 10010110101101001111111111000111001110₂
• Hexadecimal: 0x25AD3FF1CE
• Base-36: 22C7PLU6

Squares and roots of 161820438990

• 161820438990 squared (161820438990²) is 26185854474916312220100
• 161820438990 cubed (161820438990³) is 4237406466459213586968483501699000
• The square root of 161820438990 is 402269.1126472425
• The cube root of 161820438990 is 5449.3469350739

Scales and comparisons

• 161,820,438,990 seconds is equal to 5,145 years, 20 weeks, 1 day, 17 hours, 56 minutes, 30 seconds.
• To count from 1 to 161,820,438,990 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 161820438990 cubic inches would be around 454.1 feet tall.

Recreational maths with 161820438990

• 161820438990 backwards is 099834028161
• The number of decimal digits it has is: 12
• The sum of 161820438990's digits is 51
• More coming soon!