638584677100 has 18 divisors (see below), whose sum is σ = 1385728749524. Its totient is φ = 255433870800.

The previous prime is 638584677053. The next prime is 638584677113. The reversal of 638584677100 is 1776485836.

It is a super-2 number, since 2×638584677100² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3192923286 + ... + 3192923485.

Almost surely, 2^638584677100 is an apocalyptic number.

It is an amenable number.

638584677100 is an abundant number, since it is smaller than the sum of its proper divisors (747144072424).

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

638584677100 is a wasteful number, since it uses less digits than its factorization.

638584677100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6385846785 (or 6385846778 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 638584677100 in words is "six hundred thirty-eight billion, five hundred eighty-four million, six hundred seventy-seven thousand, one hundred".