| Base | Representation |
|---|---|
| bin | 1001011011011110110… |
| … | …1011011110101110000 |
| 3 | 120111010202220221121000 |
| 4 | 2112313231123311300 |
| 5 | 10123231424242432 |
| 6 | 202230411002000 |
| 7 | 14463260460000 |
| oct | 2266755336560 |
| 9 | 514122827530 |
| 10 | 161995930992 |
| 11 | 6277a530705 |
| 12 | 27490139300 |
| 13 | 1237891ab8c |
| 14 | 7baaa30000 |
| 15 | 4331ce957c |
| hex | 25b7b5bd70 |
161995930992 has 400 divisors, whose sum is σ = 554162388480. Its totient is φ = 45286141824.
The previous prime is 161995930991. The next prime is 161995931003. The reversal of 161995930992 is 299039599161.
161995930992 is a `hidden beast` number, since 1 + 6 + 199 + 59 + 309 + 92 = 666.
161995930992 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 2×1619959309922 (a number of 23 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (63).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (161995930991) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 48748243 + ... + 48751565.
Almost surely, 2161995930992 is an apocalyptic number.
161995930992 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 161995930992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277081194240).
161995930992 is an abundant number, since it is smaller than the sum of its proper divisors (392166457488).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
161995930992 is an equidigital number, since it uses as much as digits as its factorization.
161995930992 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3415 (or 3382 counting only the distinct ones).
The product of its (nonzero) digits is 10628820, while the sum is 63.
The spelling of 161995930992 in words is "one hundred sixty-one billion, nine hundred ninety-five million, nine hundred thirty thousand, nine hundred ninety-two".
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