161632164 has 24 divisors (see below), whose sum is σ = 396991840. Its totient is φ = 51041664.

The previous prime is 161632153. The next prime is 161632181. The reversal of 161632164 is 461236161.

161632164 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 2×161632164² = 52249912878645792, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354229 + ... + 354684.

Almost surely, 2^161632164 is an apocalyptic number.

It is an amenable number.

161632164 is an abundant number, since it is smaller than the sum of its proper divisors (235359676).

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

161632164 is a wasteful number, since it uses less digits than its factorization.

161632164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708939 (or 708937 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 161632164 is about 12713.4638867619. The cubic root of 161632164 is about 544.7232711217.

The spelling of 161632164 in words is "one hundred sixty-one million, six hundred thirty-two thousand, one hundred sixty-four".