22561636764 has 24 divisors (see below), whose sum is σ = 52663515520. Its totient is φ = 7517731824.

The previous prime is 22561636753. The next prime is 22561636771. The reversal of 22561636764 is 46763616522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318184 + ... + 382575.

Almost surely, 2^22561636764 is an apocalyptic number.

It is an amenable number.

22561636764 is an abundant number, since it is smaller than the sum of its proper divisors (30101878756).

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

22561636764 is a wasteful number, since it uses less digits than its factorization.

22561636764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703449 (or 703447 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 48.

The spelling of 22561636764 in words is "twenty-two billion, five hundred sixty-one million, six hundred thirty-six thousand, seven hundred sixty-four".