23654640656 has 80 divisors (see below), whose sum is σ = 48232895040. Its totient is φ = 11223313920.

The previous prime is 23654640643. The next prime is 23654640661. The reversal of 23654640656 is 65604645632.

It is a happy number.

It is a super-2 number, since 2×23654640656² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23654640656.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6502070 + ... + 6505706.

It is an arithmetic number, because the mean of its divisors is an integer number (602911188).

Almost surely, 2^23654640656 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 23654640656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24116447520).

23654640656 is an abundant number, since it is smaller than the sum of its proper divisors (24578254384).

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

23654640656 is a wasteful number, since it uses less digits than its factorization.

23654640656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912 (or 3906 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 47.

The spelling of 23654640656 in words is "twenty-three billion, six hundred fifty-four million, six hundred forty thousand, six hundred fifty-six".