638382560886 has 24 divisors (see below), whose sum is σ = 1580756817744. Its totient is φ = 182395017360.

The previous prime is 638382560873. The next prime is 638382560911. The reversal of 638382560886 is 688065283836.

638382560886 is a `hidden beast` number, since 6 + 38 + 38 + 2 + 560 + 8 + 8 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 2533264005 + ... + 2533264256.

It is an arithmetic number, because the mean of its divisors is an integer number (65864867406).

Almost surely, 2^638382560886 is an apocalyptic number.

638382560886 is an abundant number, since it is smaller than the sum of its proper divisors (942374256858).

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

638382560886 is a wasteful number, since it uses less digits than its factorization.

638382560886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066528276 (or 5066528273 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 63.

The spelling of 638382560886 in words is "six hundred thirty-eight billion, three hundred eighty-two million, five hundred sixty thousand, eight hundred eighty-six".