646594764 has 24 divisors (see below), whose sum is σ = 1545520368. Its totient is φ = 210274560.

The previous prime is 646594763. The next prime is 646594777. The reversal of 646594764 is 467495646.

It is not an unprimeable number, because it can be changed into a prime (646594763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656617 + ... + 657600.

It is an arithmetic number, because the mean of its divisors is an integer number (64396682).

Almost surely, 2^646594764 is an apocalyptic number.

It is an amenable number.

646594764 is an abundant number, since it is smaller than the sum of its proper divisors (898925604).

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

646594764 is a wasteful number, since it uses less digits than its factorization.

646594764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314265 (or 1314263 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 51.

The square root of 646594764 is about 25428.2277007266. The cubic root of 646594764 is about 864.7237644678.

The spelling of 646594764 in words is "six hundred forty-six million, five hundred ninety-four thousand, seven hundred sixty-four".