161632160 has 24 divisors (see below), whose sum is σ = 381856356. Its totient is φ = 64652800.

The previous prime is 161632153. The next prime is 161632181. The reversal of 161632160 is 61236161.

It can be written as a sum of positive squares in 2 ways, for example, as 153859216 + 7772944 = 12404^2 + 2788^2 .

It is a super-2 number, since 2×161632160² = 52249910292531200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504941 + ... + 505260.

Almost surely, 2^161632160 is an apocalyptic number.

161632160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161632160 is an abundant number, since it is smaller than the sum of its proper divisors (220224196).

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

161632160 is a wasteful number, since it uses less digits than its factorization.

161632160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010216 (or 1010208 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 161632160 is about 12713.4637294484. The cubic root of 161632160 is about 544.7232666281.

The spelling of 161632160 in words is "one hundred sixty-one million, six hundred thirty-two thousand, one hundred sixty".