648256856 has 16 divisors (see below), whose sum is σ = 1308980400. Its totient is φ = 299195424.

The previous prime is 648256837. The next prime is 648256867. The reversal of 648256856 is 658652846.

648256856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3116516 + ... + 3116723.

It is an arithmetic number, because the mean of its divisors is an integer number (81811275).

Almost surely, 2^648256856 is an apocalyptic number.

It is an amenable number.

648256856 is an abundant number, since it is smaller than the sum of its proper divisors (660723544).

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

648256856 is a wasteful number, since it uses less digits than its factorization.

648256856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6233258 (or 6233254 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 50.

The square root of 648256856 is about 25460.8887511807. Note that the first 3 decimals coincide. The cubic root of 648256856 is about 865.4640636411.

The spelling of 648256856 in words is "six hundred forty-eight million, two hundred fifty-six thousand, eight hundred fifty-six".