256696163 has 2 divisors, whose sum is σ = 256696164. Its totient is φ = 256696162.

The previous prime is 256696117. The next prime is 256696183. The reversal of 256696163 is 361696652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256696163 - 2¹⁴ = 256679779 is a prime.

It is not a weakly prime, because it can be changed into another prime (256696183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128348081 + 128348082.

It is an arithmetic number, because the mean of its divisors is an integer number (128348082).

Almost surely, 2^256696163 is an apocalyptic number.

256696163 is a deficient number, since it is larger than the sum of its proper divisors (1).

256696163 is an equidigital number, since it uses as much as digits as its factorization.

256696163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 44.

The square root of 256696163 is about 16021.7403236977. The cubic root of 256696163 is about 635.5354674888.

The spelling of 256696163 in words is "two hundred fifty-six million, six hundred ninety-six thousand, one hundred sixty-three".