639225515404 has 12 divisors (see below), whose sum is σ = 1278451030864. Its totient is φ = 273953792304.

The previous prime is 639225515381. The next prime is 639225515429. The reversal of 639225515404 is 404515522936.

639225515404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

639225515404 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11414741319 + ... + 11414741374.

Almost surely, 2^639225515404 is an apocalyptic number.

It is an amenable number.

639225515404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

639225515404 is a wasteful number, since it uses less digits than its factorization.

639225515404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22829482704 (or 22829482702 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 639225515404 in words is "six hundred thirty-nine billion, two hundred twenty-five million, five hundred fifteen thousand, four hundred four".