22561996800 has 720 divisors, whose sum is σ = 88673268992. Its totient is φ = 4954521600.

The previous prime is 22561996783. The next prime is 22561996859. The reversal of 22561996800 is 869916522.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 22561996800.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 369868770 + ... + 369868830.

Almost surely, 2^22561996800 is an apocalyptic number.

22561996800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22561996800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44336634496).

22561996800 is an abundant number, since it is smaller than the sum of its proper divisors (66111272192).

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

22561996800 is an equidigital number, since it uses as much as digits as its factorization.

22561996800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 22561996800 in words is "twenty-two billion, five hundred sixty-one million, nine hundred ninety-six thousand, eight hundred".