646256504 has 32 divisors (see below), whose sum is σ = 1284643200. Its totient is φ = 304248960.

The previous prime is 646256491. The next prime is 646256521. The reversal of 646256504 is 405652646.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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, 26039 + ... + 44390.

It is an arithmetic number, because the mean of its divisors is an integer number (40145100).

Almost surely, 2^646256504 is an apocalyptic number.

It is an amenable number.

646256504 is a deficient number, since it is larger than the sum of its proper divisors (638386696).

646256504 is a wasteful number, since it uses less digits than its factorization.

646256504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70503 (or 70499 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 646256504 is about 25421.5755609286. The cubic root of 646256504 is about 864.5729474501.

The spelling of 646256504 in words is "six hundred forty-six million, two hundred fifty-six thousand, five hundred four".