648865310256 has 80 divisors (see below), whose sum is σ = 1867851580800. Its totient is φ = 215665077312.

The previous prime is 648865310251. The next prime is 648865310263. The reversal of 648865310256 is 652013568846.

648865310256 is a `hidden beast` number, since 6 + 4 + 8 + 86 + 531 + 0 + 25 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (648865310251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2014366 + ... + 2314173.

It is an arithmetic number, because the mean of its divisors is an integer number (23348144760).

Almost surely, 2^648865310256 is an apocalyptic number.

It is an amenable number.

648865310256 is an abundant number, since it is smaller than the sum of its proper divisors (1218986270544).

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

648865310256 is a wasteful number, since it uses less digits than its factorization.

648865310256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328903 (or 4328891 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 648865310256 in words is "six hundred forty-eight billion, eight hundred sixty-five million, three hundred ten thousand, two hundred fifty-six".