648670856 has 16 divisors (see below), whose sum is σ = 1221350400. Its totient is φ = 322977424.

The previous prime is 648670843. The next prime is 648670859. The reversal of 648670856 is 658076846.

It is a happy number.

648670856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (648670859) 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, 167720 + ... + 171543.

It is an arithmetic number, because the mean of its divisors is an integer number (76334400).

Almost surely, 2^648670856 is an apocalyptic number.

It is an amenable number.

648670856 is a deficient number, since it is larger than the sum of its proper divisors (572679544).

648670856 is a wasteful number, since it uses less digits than its factorization.

648670856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339508 (or 339504 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

The square root of 648670856 is about 25469.0175703736. The cubic root of 648670856 is about 865.6482631968.

The spelling of 648670856 in words is "six hundred forty-eight million, six hundred seventy thousand, eight hundred fifty-six".