8723456656 has 20 divisors (see below), whose sum is σ = 16943858604. Its totient is φ = 4350848000.

The previous prime is 8723456639. The next prime is 8723456723. The reversal of 8723456656 is 6566543278.

It can be written as a sum of positive squares in 2 ways, for example, as 3974041600 + 4749415056 = 63040^2 + 68916^2 .

It is a super-2 number, since 2×8723456656² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 673405 + ... + 686236.

Almost surely, 2^8723456656 is an apocalyptic number.

It is an amenable number.

8723456656 is a deficient number, since it is larger than the sum of its proper divisors (8220401948).

8723456656 is a wasteful number, since it uses less digits than its factorization.

8723456656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360050 (or 1360044 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 52.

The square root of 8723456656 is about 93399.4467649568. The cubic root of 8723456656 is about 2058.5568690397.

The spelling of 8723456656 in words is "eight billion, seven hundred twenty-three million, four hundred fifty-six thousand, six hundred fifty-six".