648256863 has 48 divisors (see below), whose sum is σ = 958535424. Its totient is φ = 388523520.

The previous prime is 648256837. The next prime is 648256867. The reversal of 648256863 is 368652846.

It is not a de Polignac number, because 648256863 - 2⁸ = 648256607 is a prime.

Its product of digits (1658880) is a multiple of the sum of its prime factors (256).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648256867) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8880195 + ... + 8880267.

It is an arithmetic number, because the mean of its divisors is an integer number (19969488).

Almost surely, 2^648256863 is an apocalyptic number.

648256863 is a deficient number, since it is larger than the sum of its proper divisors (310278561).

648256863 is a wasteful number, since it uses less digits than its factorization.

648256863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 183 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 48.

The square root of 648256863 is about 25460.8888886464. Note that the first 6 decimals coincide. The cubic root of 648256863 is about 865.4640667563.

The spelling of 648256863 in words is "six hundred forty-eight million, two hundred fifty-six thousand, eight hundred sixty-three".