23217238656 has 112 divisors (see below), whose sum is σ = 69348194010. Its totient is φ = 7739048448.

The previous prime is 23217238643. The next prime is 23217238679. The reversal of 23217238656 is 65683271232.

23217238656 is a `hidden beast` number, since 2 + 3 + 217 + 2 + 386 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22796168256 + 421070400 = 150984^2 + 20520^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 31095 + ... + 217718.

Almost surely, 2^23217238656 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 23217238656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34674097005).

23217238656 is an abundant number, since it is smaller than the sum of its proper divisors (46130955354).

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

23217238656 is an frugal number, since it uses more digits than its factorization.

23217238656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248845 (or 248818 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 23217238656 in words is "twenty-three billion, two hundred seventeen million, two hundred thirty-eight thousand, six hundred fifty-six".