256653698711 has 2 divisors, whose sum is σ = 256653698712. Its totient is φ = 256653698710.

The previous prime is 256653698677. The next prime is 256653698713. The reversal of 256653698711 is 117896356652.

It is a happy number.

256653698711 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256653698711 is a prime.

It is a super-2 number, since 2×256653698711² (a number of 24 digits) contains 22 as substring.

Together with 256653698713, 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 (256653698713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128326849355 + 128326849356.

It is an arithmetic number, because the mean of its divisors is an integer number (128326849356).

Almost surely, 2^256653698711 is an apocalyptic number.

256653698711 is a deficient number, since it is larger than the sum of its proper divisors (1).

256653698711 is an equidigital number, since it uses as much as digits as its factorization.

256653698711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16329600, while the sum is 59.

The spelling of 256653698711 in words is "two hundred fifty-six billion, six hundred fifty-three million, six hundred ninety-eight thousand, seven hundred eleven".