22639438566 has 48 divisors (see below), whose sum is σ = 50848830864. Its totient is φ = 7273876032.

The previous prime is 22639438561. The next prime is 22639438579. The reversal of 22639438566 is 66583493622.

It is a happy number.

22639438566 is a `hidden beast` number, since 2 + 2 + 6 + 39 + 43 + 8 + 566 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22639438561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87585 + ... + 230108.

It is an arithmetic number, because the mean of its divisors is an integer number (1059350643).

Almost surely, 2^22639438566 is an apocalyptic number.

22639438566 is an abundant number, since it is smaller than the sum of its proper divisors (28209392298).

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

22639438566 is a wasteful number, since it uses less digits than its factorization.

22639438566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317845 (or 317842 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 54.

The spelling of 22639438566 in words is "twenty-two billion, six hundred thirty-nine million, four hundred thirty-eight thousand, five hundred sixty-six".