22644874637826 has 256 divisors, whose sum is σ = 58857947136000. Its totient is φ = 5659577713152.

The previous prime is 22644874637773. The next prime is 22644874637843. The reversal of 22644874637826 is 62873647844622.

It is a Harshad number since it is a multiple of its sum of digits (69).

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, 62792775 + ... + 63152373.

It is an arithmetic number, because the mean of its divisors is an integer number (229913856000).

Almost surely, 2^{22644874637826} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22644874637826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29428973568000).

22644874637826 is an abundant number, since it is smaller than the sum of its proper divisors (36213072498174).

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

22644874637826 is a wasteful number, since it uses less digits than its factorization.

22644874637826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359773.

The product of its digits is 1040449536, while the sum is 69.

The spelling of 22644874637826 in words is "twenty-two trillion, six hundred forty-four billion, eight hundred seventy-four million, six hundred thirty-seven thousand, eight hundred twenty-six".