656555472 has 60 divisors (see below), whose sum is σ = 1844050624. Its totient is φ = 218064960.

The previous prime is 656555437. The next prime is 656555513. The reversal of 656555472 is 274555656.

656555472 is a `hidden beast` number, since 6 + 56 + 55 + 547 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32697 + ... + 48807.

Almost surely, 2^656555472 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 656555472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (922025312).

656555472 is an abundant number, since it is smaller than the sum of its proper divisors (1187495152).

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

656555472 is a wasteful number, since it uses less digits than its factorization.

656555472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16408 (or 16399 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 45.

The square root of 656555472 is about 25623.3384241788. The cubic root of 656555472 is about 869.1414757105.

The spelling of 656555472 in words is "six hundred fifty-six million, five hundred fifty-five thousand, four hundred seventy-two".