161353992 has 32 divisors (see below), whose sum is σ = 408250080. Its totient is φ = 53136000.

The previous prime is 161353957. The next prime is 161354009. The reversal of 161353992 is 299353161.

161353992 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 2×161353992² = 52070221468672128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161353992.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38509 + ... + 42492.

It is an arithmetic number, because the mean of its divisors is an integer number (12757815).

Almost surely, 2^161353992 is an apocalyptic number.

161353992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161353992 is an abundant number, since it is smaller than the sum of its proper divisors (246896088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161353992 is a wasteful number, since it uses less digits than its factorization.

161353992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81093 (or 81089 counting only the distinct ones).

The product of its digits is 43740, while the sum is 39.

The square root of 161353992 is about 12702.5191202375. The cubic root of 161353992 is about 544.4105986765.

The spelling of 161353992 in words is "one hundred sixty-one million, three hundred fifty-three thousand, nine hundred ninety-two".