22515764808 has 128 divisors (see below), whose sum is σ = 61177835520. Its totient is φ = 6886091520.

The previous prime is 22515764779. The next prime is 22515764809. The reversal of 22515764808 is 80846751522.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (22515764809) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1442341 + ... + 1457867.

It is an arithmetic number, because the mean of its divisors is an integer number (477951840).

Almost surely, 2^22515764808 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 22515764808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30588917760).

22515764808 is an abundant number, since it is smaller than the sum of its proper divisors (38662070712).

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

22515764808 is a wasteful number, since it uses less digits than its factorization.

22515764808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15667 (or 15663 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 48.

The spelling of 22515764808 in words is "twenty-two billion, five hundred fifteen million, seven hundred sixty-four thousand, eight hundred eight".