639702673004 has 24 divisors (see below), whose sum is σ = 1123193421168. Its totient is φ = 318790517760.

The previous prime is 639702672991. The next prime is 639702673063. The reversal of 639702673004 is 400376207936.

It is a self number, because there is not a number n which added to its sum of digits gives 639702673004.

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, 12114299 + ... + 12166989.

It is an arithmetic number, because the mean of its divisors is an integer number (46799725882).

Almost surely, 2^639702673004 is an apocalyptic number.

It is an amenable number.

639702673004 is a deficient number, since it is larger than the sum of its proper divisors (483490748164).

639702673004 is a wasteful number, since it uses less digits than its factorization.

639702673004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62705 (or 62703 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 47.

The spelling of 639702673004 in words is "six hundred thirty-nine billion, seven hundred two million, six hundred seventy-three thousand, four".