656082172 has 24 divisors (see below), whose sum is σ = 1159622352. Its totient is φ = 324777600.

The previous prime is 656082149. The next prime is 656082197. The reversal of 656082172 is 271280656.

It is a happy number.

656082172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 181422 + ... + 185002.

It is an arithmetic number, because the mean of its divisors is an integer number (48317598).

Almost surely, 2^656082172 is an apocalyptic number.

It is an amenable number.

656082172 is a deficient number, since it is larger than the sum of its proper divisors (503540180).

656082172 is a wasteful number, since it uses less digits than its factorization.

656082172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4029 (or 4027 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 656082172 is about 25614.1010382953. The cubic root of 656082172 is about 868.9325755915.

The spelling of 656082172 in words is "six hundred fifty-six million, eighty-two thousand, one hundred seventy-two".