| Base | Representation |
|---|---|
| bin | 101101010111001111111110… |
| … | …111010111100010110110000 |
| 3 | 222011101221200011222200011100 |
| 4 | 231113033332322330112300 |
| 5 | 202122232033444342203 |
| 6 | 1544153312120444400 |
| 7 | 60011051620265454 |
| oct | 5527177672742660 |
| 9 | 864357604880140 |
| 10 | 199509802730928 |
| 11 | 5862a6a5482778 |
| 12 | 1a462405319700 |
| 13 | 8742902cbc311 |
| 14 | 373a47c692664 |
| 15 | 180ea93d4dea3 |
| hex | b573feebc5b0 |
199509802730928 has 480 divisors, whose sum is σ = 591389313840000. Its totient is φ = 62700528844800.
The previous prime is 199509802730911. The next prime is 199509802730963. The reversal of 199509802730928 is 829037208905991.
199509802730928 is a `hidden beast` number, since 1 + 9 + 9 + 509 + 8 + 0 + 27 + 3 + 0 + 92 + 8 = 666.
199509802730928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a super-2 number, since 2×1995098027309282 (a number of 29 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (72).
It is an unprimeable number.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9708968398 + ... + 9708988946.
It is an arithmetic number, because the mean of its divisors is an integer number (1232061070500).
Almost surely, 2199509802730928 is an apocalyptic number.
199509802730928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 199509802730928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295694656920000).
199509802730928 is an abundant number, since it is smaller than the sum of its proper divisors (391879511109072).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
199509802730928 is a wasteful number, since it uses less digits than its factorization.
199509802730928 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 21005 (or 20996 counting only the distinct ones).
The product of its (nonzero) digits is 176359680, while the sum is 72.
The spelling of 199509802730928 in words is "one hundred ninety-nine trillion, five hundred nine billion, eight hundred two million, seven hundred thirty thousand, nine hundred twenty-eight".
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