| Base | Representation |
|---|---|
| bin | 100100110010010101011001… |
| … | …110010101011110000011000 |
| 3 | 210012211211201202201120111000 |
| 4 | 210302111121302223300120 |
| 5 | 132201221103130003142 |
| 6 | 1332032400443305000 |
| 7 | 46035562030352433 |
| oct | 4462253162536030 |
| 9 | 705754652646430 |
| 10 | 161788629531672 |
| 11 | 47607199605800 |
| 12 | 1618b87881b160 |
| 13 | 6c377aa340460 |
| 14 | 2bd487bb6c81a |
| 15 | 13a8760a5d14c |
| hex | 932559cabc18 |
161788629531672 has 768 divisors, whose sum is σ = 537828302592000. Its totient is φ = 44760646656000.
The previous prime is 161788629531647. The next prime is 161788629531713. The reversal of 161788629531672 is 276135926887161.
161788629531672 is a `hidden beast` number, since 1 + 6 + 1 + 7 + 8 + 8 + 6 + 29 + 531 + 67 + 2 = 666.
It is a super-2 number, since 2×1617886295316722 (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 a self number, because there is not a number n which added to its sum of digits gives 161788629531672.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 12798714472 + ... + 12798727112.
It is an arithmetic number, because the mean of its divisors is an integer number (700297269000).
Almost surely, 2161788629531672 is an apocalyptic number.
161788629531672 is a gapful number since it is divisible by the number (12) 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 161788629531672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268914151296000).
161788629531672 is an abundant number, since it is smaller than the sum of its proper divisors (376039673060328).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
161788629531672 is a wasteful number, since it uses less digits than its factorization.
161788629531672 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 13101 (or 13080 counting only the distinct ones).
The product of its digits is 365783040, while the sum is 72.
The spelling of 161788629531672 in words is "one hundred sixty-one trillion, seven hundred eighty-eight billion, six hundred twenty-nine million, five hundred thirty-one thousand, six hundred seventy-two".
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