22155589764 has 216 divisors, whose sum is σ = 72157385664. Its totient is φ = 5568393600.

The previous prime is 22155589763. The next prime is 22155589823. The reversal of 22155589764 is 46798555122.

22155589764 is a `hidden beast` number, since 2 + 2 + 1 + 55 + 589 + 7 + 6 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 22155589764.

It is not an unprimeable number, because it can be changed into a prime (22155589763) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2659734 + ... + 2668050.

Almost surely, 2^22155589764 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 22155589764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36078692832).

22155589764 is an abundant number, since it is smaller than the sum of its proper divisors (50001795900).

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

22155589764 is a wasteful number, since it uses less digits than its factorization.

22155589764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8407 (or 8371 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 54.

The spelling of 22155589764 in words is "twenty-two billion, one hundred fifty-five million, five hundred eighty-nine thousand, seven hundred sixty-four".