156639964 has 24 divisors (see below), whose sum is σ = 296090928. Its totient is φ = 72078720.

The previous prime is 156639943. The next prime is 156639979. The reversal of 156639964 is 469936651.

156639964 is digitally balanced in base 3, 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 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, 13704 + ... + 22384.

It is an arithmetic number, because the mean of its divisors is an integer number (12337122).

Almost surely, 2^156639964 is an apocalyptic number.

It is an amenable number.

156639964 is a deficient number, since it is larger than the sum of its proper divisors (139450964).

156639964 is a wasteful number, since it uses less digits than its factorization.

156639964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9045 (or 9043 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 49.

The square root of 156639964 is about 12515.5888395233. The cubic root of 156639964 is about 539.0563813053.

The spelling of 156639964 in words is "one hundred fifty-six million, six hundred thirty-nine thousand, nine hundred sixty-four".