22644336256 has 64 divisors (see below), whose sum is σ = 47023166880. Its totient is φ = 10851591168.

The previous prime is 22644336233. The next prime is 22644336259. The reversal of 22644336256 is 65263344622.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (22644336259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281631 + ... + 352993.

Almost surely, 2^22644336256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22644336256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23511583440).

22644336256 is an abundant number, since it is smaller than the sum of its proper divisors (24378830624).

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

22644336256 is an equidigital number, since it uses as much as digits as its factorization.

22644336256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71481 (or 71469 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 43.

The spelling of 22644336256 in words is "twenty-two billion, six hundred forty-four million, three hundred thirty-six thousand, two hundred fifty-six".