256258668211 has 12 divisors (see below), whose sum is σ = 321027343392. Its totient is φ = 202754110608.

The previous prime is 256258668209. The next prime is 256258668217. The reversal of 256258668211 is 112866852652.

It is not a de Polignac number, because 256258668211 - 2¹ = 256258668209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256258668217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201144315 + ... + 201145588.

It is an arithmetic number, because the mean of its divisors is an integer number (26752278616).

Almost surely, 2^256258668211 is an apocalyptic number.

256258668211 is a deficient number, since it is larger than the sum of its proper divisors (64768675181).

256258668211 is a wasteful number, since it uses less digits than its factorization.

256258668211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402289930 (or 402289923 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 52.

The spelling of 256258668211 in words is "two hundred fifty-six billion, two hundred fifty-eight million, six hundred sixty-eight thousand, two hundred eleven".