161180904 has 32 divisors (see below), whose sum is σ = 415952640. Its totient is φ = 51993600.

The previous prime is 161180879. The next prime is 161180947. The reversal of 161180904 is 409081161.

161180904 is digitally balanced in base 3, 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 7 ways as a sum of consecutive naturals, for example, 107577 + ... + 109064.

It is an arithmetic number, because the mean of its divisors is an integer number (12998520).

Almost surely, 2^161180904 is an apocalyptic number.

It is an amenable number.

161180904 is an abundant number, since it is smaller than the sum of its proper divisors (254771736).

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

161180904 is a wasteful number, since it uses less digits than its factorization.

161180904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216681 (or 216677 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 161180904 is about 12695.7041553433. The cubic root of 161180904 is about 544.2158619258.

The spelling of 161180904 in words is "one hundred sixty-one million, one hundred eighty thousand, nine hundred four".