22656465621 has 24 divisors (see below), whose sum is σ = 34455331040. Its totient is φ = 14306479200.

The previous prime is 22656465593. The next prime is 22656465677. The reversal of 22656465621 is 12656465622.

22656465621 is a `hidden beast` number, since 2 + 2 + 6 + 564 + 65 + 6 + 21 = 666.

It is not a de Polignac number, because 22656465621 - 2⁹ = 22656465109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22656465691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1129086 + ... + 1148976.

Almost surely, 2^22656465621 is an apocalyptic number.

It is an amenable number.

22656465621 is a deficient number, since it is larger than the sum of its proper divisors (11798865419).

22656465621 is a wasteful number, since it uses less digits than its factorization.

22656465621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26577 (or 26574 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

Subtracting from 22656465621 its reverse (12656465622), we obtain a palindrome (9999999999).

The spelling of 22656465621 in words is "twenty-two billion, six hundred fifty-six million, four hundred sixty-five thousand, six hundred twenty-one".