256510163 has 16 divisors (see below), whose sum is σ = 317614080. Its totient is φ = 201725856.

The previous prime is 256510157. The next prime is 256510217. The reversal of 256510163 is 361015652.

It is a cyclic number.

It is not a de Polignac number, because 256510163 - 2⁴ = 256510147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256510153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6758 + ... + 23636.

It is an arithmetic number, because the mean of its divisors is an integer number (19850880).

Almost surely, 2^256510163 is an apocalyptic number.

256510163 is a deficient number, since it is larger than the sum of its proper divisors (61103917).

256510163 is a wasteful number, since it uses less digits than its factorization.

256510163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17066.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 256510163 is about 16015.9346589576. The cubic root of 256510163 is about 635.3819290820.

The spelling of 256510163 in words is "two hundred fifty-six million, five hundred ten thousand, one hundred sixty-three".