638583083216 has 20 divisors (see below), whose sum is σ = 1332428164452. Its totient is φ = 294730653696.

The previous prime is 638583083197. The next prime is 638583083227. The reversal of 638583083216 is 612380385836.

It can be written as a sum of positive squares in 2 ways, for example, as 324781450816 + 313801632400 = 569896^2 + 560180^2 .

It is a congruent 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, 1535055281 + ... + 1535055696.

Almost surely, 2^638583083216 is an apocalyptic number.

It is an amenable number.

638583083216 is an abundant number, since it is smaller than the sum of its proper divisors (693845081236).

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

638583083216 is a wasteful number, since it uses less digits than its factorization.

638583083216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3070110998 (or 3070110992 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 638583083216 in words is "six hundred thirty-eight billion, five hundred eighty-three million, eighty-three thousand, two hundred sixteen".