638825062625 has 16 divisors (see below), whose sum is σ = 799069814400. Its totient is φ = 509895860400.

The previous prime is 638825062613. The next prime is 638825062639. The reversal of 638825062625 is 526260528836.

It is a de Polignac number, because none of the positive numbers 2^k-638825062625 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5765855 + ... + 5875604.

It is an arithmetic number, because the mean of its divisors is an integer number (49941863400).

Almost surely, 2^638825062625 is an apocalyptic number.

It is an amenable number.

638825062625 is a deficient number, since it is larger than the sum of its proper divisors (160244751775).

638825062625 is a wasteful number, since it uses less digits than its factorization.

638825062625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11641913 (or 11641903 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 53.

The spelling of 638825062625 in words is "six hundred thirty-eight billion, eight hundred twenty-five million, sixty-two thousand, six hundred twenty-five".