640223472824 has 16 divisors (see below), whose sum is σ = 1292758935720. Its totient is φ = 295487756640.

The previous prime is 640223472809. The next prime is 640223472857. The reversal of 640223472824 is 428274322046.

It is a congruent number.

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, 3077997362 + ... + 3077997569.

Almost surely, 2^640223472824 is an apocalyptic number.

It is an amenable number.

640223472824 is an abundant number, since it is smaller than the sum of its proper divisors (652535462896).

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

640223472824 is a wasteful number, since it uses less digits than its factorization.

640223472824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6155994950 (or 6155994946 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 44.

The spelling of 640223472824 in words is "six hundred forty billion, two hundred twenty-three million, four hundred seventy-two thousand, eight hundred twenty-four".