638716556204 has 6 divisors (see below), whose sum is σ = 1117753973364. Its totient is φ = 319358278100.

The previous prime is 638716556189. The next prime is 638716556239. The reversal of 638716556204 is 402655617836.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79839569522 + ... + 79839569529.

It is an arithmetic number, because the mean of its divisors is an integer number (186292328894).

Almost surely, 2^638716556204 is an apocalyptic number.

It is an amenable number.

638716556204 is a deficient number, since it is larger than the sum of its proper divisors (479037417160).

638716556204 is a wasteful number, since it uses less digits than its factorization.

638716556204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159679139055 (or 159679139053 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 638716556204 in words is "six hundred thirty-eight billion, seven hundred sixteen million, five hundred fifty-six thousand, two hundred four".