22644399960 has 512 divisors, whose sum is σ = 93768192000. Its totient is φ = 4733116416.

The previous prime is 22644399919. The next prime is 22644399977. The reversal of 22644399960 is 6999344622.

22644399960 is a `hidden beast` number, since 2 + 2 + 64 + 439 + 99 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 22644399897 and 22644399906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11104621 + ... + 11106659.

It is an arithmetic number, because the mean of its divisors is an integer number (183141000).

Almost surely, 2^22644399960 is an apocalyptic number.

22644399960 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 22644399960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46884096000).

22644399960 is an abundant number, since it is smaller than the sum of its proper divisors (71123792040).

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

22644399960 is a wasteful number, since it uses less digits than its factorization.

22644399960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192 (or 2182 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The spelling of 22644399960 in words is "twenty-two billion, six hundred forty-four million, three hundred ninety-nine thousand, nine hundred sixty".