22561520544400 has 30 divisors (see below), whose sum is σ = 54204053108882. Its totient is φ = 9024608217600.

The previous prime is 22561520544397. The next prime is 22561520544467. The reversal of 22561520544400 is 444502516522.

It can be written as a sum of positive squares in 3 ways, for example, as 5869785399696 + 16691735144704 = 2422764^2 + 4085552^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28201900281 + ... + 28201901080.

Almost surely, 2^{22561520544400} is an apocalyptic number.

22561520544400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22561520544400 is an abundant number, since it is smaller than the sum of its proper divisors (31642532564482).

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

22561520544400 is a wasteful number, since it uses less digits than its factorization.

22561520544400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56403801379 (or 56403801368 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 40.

The spelling of 22561520544400 in words is "twenty-two trillion, five hundred sixty-one billion, five hundred twenty million, five hundred forty-four thousand, four hundred".