648460656 has 30 divisors (see below), whose sum is σ = 1814789600. Its totient is φ = 216153504.

The previous prime is 648460651. The next prime is 648460663. The reversal of 648460656 is 656064846.

648460656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648460651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2251456 + ... + 2251743.

Almost surely, 2^648460656 is an apocalyptic number.

It is an amenable number.

648460656 is an abundant number, since it is smaller than the sum of its proper divisors (1166328944).

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

648460656 is a wasteful number, since it uses less digits than its factorization.

648460656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503213 (or 4503204 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The square root of 648460656 is about 25464.8906536038. The cubic root of 648460656 is about 865.5547494519.

The spelling of 648460656 in words is "six hundred forty-eight million, four hundred sixty thousand, six hundred fifty-six".