22638809808 has 30 divisors (see below), whose sum is σ = 63357225074. Its totient is φ = 7546269888.

The previous prime is 22638809803. The next prime is 22638809821. The reversal of 22638809808 is 80890883622.

It can be written as a sum of positive squares in only one way, i.e., 20687644224 + 1951165584 = 143832^2 + 44172^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22638809801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78606835 + ... + 78607122.

Almost surely, 2^22638809808 is an apocalyptic number.

It is an amenable number.

22638809808 is an abundant number, since it is smaller than the sum of its proper divisors (40718415266).

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

22638809808 is a wasteful number, since it uses less digits than its factorization.

22638809808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157213971 (or 157213962 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 22638809808 in words is "twenty-two billion, six hundred thirty-eight million, eight hundred nine thousand, eight hundred eight".