640328416004 has 24 divisors (see below), whose sum is σ = 1215429695928. Its totient is φ = 293981480960.

The previous prime is 640328415989. The next prime is 640328416027. The reversal of 640328416004 is 400614823046.

It can be written as a sum of positive squares in 4 ways, for example, as 85192900 + 640243223104 = 9230^2 + 800152^2 .

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, 114833729 + ... + 114839304.

It is an arithmetic number, because the mean of its divisors is an integer number (50642903997).

Almost surely, 2^640328416004 is an apocalyptic number.

It is an amenable number.

640328416004 is a deficient number, since it is larger than the sum of its proper divisors (575101279924).

640328416004 is a wasteful number, since it uses less digits than its factorization.

640328416004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229673095 (or 229673093 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

The spelling of 640328416004 in words is "six hundred forty billion, three hundred twenty-eight million, four hundred sixteen thousand, four".