256842635711 has 8 divisors (see below), whose sum is σ = 257150036880. Its totient is φ = 256535302912.

The previous prime is 256842635639. The next prime is 256842635713. The reversal of 256842635711 is 117536248652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256842635711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256842635711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256842635713) 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 7 ways as a sum of consecutive naturals, for example, 15313616 + ... + 15330378.

It is an arithmetic number, because the mean of its divisors is an integer number (32143754610).

Almost surely, 2^256842635711 is an apocalyptic number.

256842635711 is a deficient number, since it is larger than the sum of its proper divisors (307401169).

256842635711 is a wasteful number, since it uses less digits than its factorization.

256842635711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34185.

The product of its digits is 2419200, while the sum is 50.

The spelling of 256842635711 in words is "two hundred fifty-six billion, eight hundred forty-two million, six hundred thirty-five thousand, seven hundred eleven".