256960112191 has 4 divisors (see below), whose sum is σ = 257770712232. Its totient is φ = 256149512152.

The previous prime is 256960112153. The next prime is 256960112203. The reversal of 256960112191 is 191211069652.

256960112191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256960112191 is a prime.

It is a super-2 number, since 2×256960112191² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256960112131) 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 in 3 ways as a sum of consecutive naturals, for example, 405299545 + ... + 405300178.

It is an arithmetic number, because the mean of its divisors is an integer number (64442678058).

Almost surely, 2^256960112191 is an apocalyptic number.

256960112191 is a deficient number, since it is larger than the sum of its proper divisors (810600041).

256960112191 is an equidigital number, since it uses as much as digits as its factorization.

256960112191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810600040.

The product of its (nonzero) digits is 58320, while the sum is 43.

The spelling of 256960112191 in words is "two hundred fifty-six billion, nine hundred sixty million, one hundred twelve thousand, one hundred ninety-one".