22815238656 has 160 divisors (see below), whose sum is σ = 69697824768. Its totient is φ = 6496727040.

The previous prime is 22815238577. The next prime is 22815238669. The reversal of 22815238656 is 65683251822.

It is a super-2 number, since 2×22815238656² (a number of 22 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3340461 + ... + 3347283.

Almost surely, 2^22815238656 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 22815238656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34848912384).

22815238656 is an abundant number, since it is smaller than the sum of its proper divisors (46882586112).

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

22815238656 is an equidigital number, since it uses as much as digits as its factorization.

22815238656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7162 (or 7146 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 48.

The spelling of 22815238656 in words is "twenty-two billion, eight hundred fifteen million, two hundred thirty-eight thousand, six hundred fifty-six".