638107832682 has 24 divisors (see below), whose sum is σ = 1384867438500. Its totient is φ = 212348692800.

The previous prime is 638107832627. The next prime is 638107832707. The reversal of 638107832682 is 286238701836.

It can be written as a sum of positive squares in 2 ways, for example, as 637488868041 + 618964641 = 798429^2 + 24879^2 .

It is a super-2 number, since 2×638107832682² (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 11 ways as a sum of consecutive naturals, for example, 29482057 + ... + 29503692.

Almost surely, 2^638107832682 is an apocalyptic number.

638107832682 is an abundant number, since it is smaller than the sum of its proper divisors (746759605818).

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

638107832682 is a wasteful number, since it uses less digits than its factorization.

638107832682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58986358 (or 58986355 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 638107832682 in words is "six hundred thirty-eight billion, one hundred seven million, eight hundred thirty-two thousand, six hundred eighty-two".