256853711 has 2 divisors, whose sum is σ = 256853712. Its totient is φ = 256853710.

The previous prime is 256853689. The next prime is 256853713. The reversal of 256853711 is 117358652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256853711 - 2¹⁸ = 256591567 is a prime.

It is a Sophie Germain prime.

Together with 256853713, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256853713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128426855 + 128426856.

It is an arithmetic number, because the mean of its divisors is an integer number (128426856).

Almost surely, 2^256853711 is an apocalyptic number.

256853711 is a deficient number, since it is larger than the sum of its proper divisors (1).

256853711 is an equidigital number, since it uses as much as digits as its factorization.

256853711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 38.

The square root of 256853711 is about 16026.6562638624. The cubic root of 256853711 is about 635.6654614645.

The spelling of 256853711 in words is "two hundred fifty-six million, eight hundred fifty-three thousand, seven hundred eleven".