653623864 has 16 divisors (see below), whose sum is σ = 1290047400. Its totient is φ = 309611232.

The previous prime is 653623811. The next prime is 653623891. The reversal of 653623864 is 468326356.

It is a self number, because there is not a number n which added to its sum of digits gives 653623864.

It is a congruent number.

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, 2149927 + ... + 2150230.

Almost surely, 2^653623864 is an apocalyptic number.

It is an amenable number.

653623864 is a deficient number, since it is larger than the sum of its proper divisors (636423536).

653623864 is a wasteful number, since it uses less digits than its factorization.

653623864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300182 (or 4300178 counting only the distinct ones).

The product of its digits is 622080, while the sum is 43.

The square root of 653623864 is about 25566.0686066513. The cubic root of 653623864 is about 867.8459345577.

The spelling of 653623864 in words is "six hundred fifty-three million, six hundred twenty-three thousand, eight hundred sixty-four".