638583053836 has 24 divisors (see below), whose sum is σ = 1375409655200. Its totient is φ = 252626262912.

The previous prime is 638583053827. The next prime is 638583053851. The reversal of 638583053836 is 638350385836.

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, 877174161 + ... + 877174888.

Almost surely, 2^638583053836 is an apocalyptic number.

It is an amenable number.

638583053836 is an abundant number, since it is smaller than the sum of its proper divisors (736826601364).

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

638583053836 is a wasteful number, since it uses less digits than its factorization.

638583053836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754349073 (or 1754349071 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 58.

The spelling of 638583053836 in words is "six hundred thirty-eight billion, five hundred eighty-three million, fifty-three thousand, eight hundred thirty-six".