638376531102 has 24 divisors (see below), whose sum is σ = 1434376898136. Its totient is φ = 212792176872.

The previous prime is 638376531053. The next prime is 638376531139. The reversal of 638376531102 is 201135673836.

638376531102 is a `hidden beast` number, since 6 + 3 + 8 + 3 + 7 + 6 + 531 + 102 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 656765493 + ... + 656766464.

It is an arithmetic number, because the mean of its divisors is an integer number (59765704089).

Almost surely, 2^638376531102 is an apocalyptic number.

638376531102 is an abundant number, since it is smaller than the sum of its proper divisors (796000367034).

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

638376531102 is a wasteful number, since it uses less digits than its factorization.

638376531102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313531974 (or 1313531962 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 638376531102 in words is "six hundred thirty-eight billion, three hundred seventy-six million, five hundred thirty-one thousand, one hundred two".