647210656 has 24 divisors (see below), whose sum is σ = 1274888160. Its totient is φ = 323429568.

The previous prime is 647210647. The next prime is 647210693. The reversal of 647210656 is 656012746.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70525 + ... + 79171.

It is an arithmetic number, because the mean of its divisors is an integer number (53120340).

Almost surely, 2^647210656 is an apocalyptic number.

It is an amenable number.

647210656 is a deficient number, since it is larger than the sum of its proper divisors (627677504).

647210656 is a wasteful number, since it uses less digits than its factorization.

647210656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10996 (or 10988 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 647210656 is about 25440.3352179172. The cubic root of 647210656 is about 864.9982318117.

The spelling of 647210656 in words is "six hundred forty-seven million, two hundred ten thousand, six hundred fifty-six".