638861572714 has 32 divisors (see below), whose sum is σ = 1028171802240. Its totient is φ = 297027162432.

The previous prime is 638861572709. The next prime is 638861572717. The reversal of 638861572714 is 417275168836.

It is not an unprimeable number, because it can be changed into a prime (638861572717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 936292 + ... + 1467775.

It is an arithmetic number, because the mean of its divisors is an integer number (32130368820).

Almost surely, 2^638861572714 is an apocalyptic number.

638861572714 is a deficient number, since it is larger than the sum of its proper divisors (389310229526).

638861572714 is a wasteful number, since it uses less digits than its factorization.

638861572714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404254.

The product of its digits is 13547520, while the sum is 58.

The spelling of 638861572714 in words is "six hundred thirty-eight billion, eight hundred sixty-one million, five hundred seventy-two thousand, seven hundred fourteen".