653944768 has 28 divisors (see below), whose sum is σ = 1300048200. Its totient is φ = 326373632.

The previous prime is 653944757. The next prime is 653944769. The reversal of 653944768 is 867449356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653944769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26958 + ... + 45106.

Almost surely, 2^653944768 is an apocalyptic number.

It is an amenable number.

653944768 is a deficient number, since it is larger than the sum of its proper divisors (646103432).

653944768 is a wasteful number, since it uses less digits than its factorization.

653944768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18724 (or 18714 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 52.

The square root of 653944768 is about 25572.3438112348. The cubic root of 653944768 is about 867.9879375673.

The spelling of 653944768 in words is "six hundred fifty-three million, nine hundred forty-four thousand, seven hundred sixty-eight".