653605672 has 8 divisors (see below), whose sum is σ = 1225510650. Its totient is φ = 326802832.

The previous prime is 653605663. The next prime is 653605721. The reversal of 653605672 is 276506356.

It can be written as a sum of positive squares in only one way, i.e., 644448996 + 9156676 = 25386^2 + 3026^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40850347 + ... + 40850362.

Almost surely, 2^653605672 is an apocalyptic number.

It is an amenable number.

653605672 is a deficient number, since it is larger than the sum of its proper divisors (571904978).

653605672 is a wasteful number, since it uses less digits than its factorization.

653605672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81700715 (or 81700711 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 40.

The square root of 653605672 is about 25565.7128201034. The cubic root of 653605672 is about 867.8378830363.

The spelling of 653605672 in words is "six hundred fifty-three million, six hundred five thousand, six hundred seventy-two".