640524264 has 16 divisors (see below), whose sum is σ = 1601310720. Its totient is φ = 213508080.

The previous prime is 640524253. The next prime is 640524281. The reversal of 640524264 is 462425046.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13344232 + ... + 13344279.

It is an arithmetic number, because the mean of its divisors is an integer number (100081920).

Almost surely, 2^640524264 is an apocalyptic number.

It is an amenable number.

640524264 is an abundant number, since it is smaller than the sum of its proper divisors (960786456).

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

640524264 is a wasteful number, since it uses less digits than its factorization.

640524264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26688520 (or 26688516 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 640524264 is about 25308.5808373366. The cubic root of 640524264 is about 862.0091227369.

The spelling of 640524264 in words is "six hundred forty million, five hundred twenty-four thousand, two hundred sixty-four".