22566640213656 has 192 divisors, whose sum is σ = 76209744049920. Its totient is φ = 5860641980160.

The previous prime is 22566640213619. The next prime is 22566640213687. The reversal of 22566640213656 is 65631204666522.

It is a super-2 number, since 2×22566640213656² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39706711 + ... + 40271033.

It is an arithmetic number, because the mean of its divisors is an integer number (396925750260).

Almost surely, 2^{22566640213656} 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 22566640213656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38104872024960).

22566640213656 is an abundant number, since it is smaller than the sum of its proper divisors (53643103836264).

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

22566640213656 is a wasteful number, since it uses less digits than its factorization.

22566640213656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571566 (or 571559 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 54.

The spelling of 22566640213656 in words is "twenty-two trillion, five hundred sixty-six billion, six hundred forty million, two hundred thirteen thousand, six hundred fifty-six".