638299806632 has 16 divisors (see below), whose sum is σ = 1201819723200. Its totient is φ = 317814547120.

The previous prime is 638299806589. The next prime is 638299806643. The reversal of 638299806632 is 236608992836.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166917494 + ... + 166921317.

It is an arithmetic number, because the mean of its divisors is an integer number (75113732700).

Almost surely, 2^638299806632 is an apocalyptic number.

It is an amenable number.

638299806632 is a deficient number, since it is larger than the sum of its proper divisors (563519916568).

638299806632 is a wasteful number, since it uses less digits than its factorization.

638299806632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333839056 (or 333839052 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 62.

The spelling of 638299806632 in words is "six hundred thirty-eight billion, two hundred ninety-nine million, eight hundred six thousand, six hundred thirty-two".