22563448638 has 48 divisors (see below), whose sum is σ = 48064680720. Its totient is φ = 7058351872.

The previous prime is 22563448631. The next prime is 22563448643. The reversal of 22563448638 is 83684436522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22563448631) 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, 101158 + ... + 235286.

It is an arithmetic number, because the mean of its divisors is an integer number (1001347515).

Almost surely, 2^22563448638 is an apocalyptic number.

22563448638 is an abundant number, since it is smaller than the sum of its proper divisors (25501232082).

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

22563448638 is a wasteful number, since it uses less digits than its factorization.

22563448638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134233 (or 134210 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 51.

The spelling of 22563448638 in words is "twenty-two billion, five hundred sixty-three million, four hundred forty-eight thousand, six hundred thirty-eight".