161869504 has 28 divisors (see below), whose sum is σ = 328050144. Its totient is φ = 79211264.

The previous prime is 161869489. The next prime is 161869541. The reversal of 161869504 is 405968161.

161869504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 23899 + ... + 29914.

Almost surely, 2^161869504 is an apocalyptic number.

It is an amenable number.

161869504 is an abundant number, since it is smaller than the sum of its proper divisors (166180640).

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

161869504 is an equidigital number, since it uses as much as digits as its factorization.

161869504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53872 (or 53862 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 161869504 is about 12722.7946615514. The cubic root of 161869504 is about 544.9897638568.

The spelling of 161869504 in words is "one hundred sixty-one million, eight hundred sixty-nine thousand, five hundred four".