256834947213 has 24 divisors (see below), whose sum is σ = 402666887168. Its totient is φ = 156807760032.

The previous prime is 256834947211. The next prime is 256834947221. The reversal of 256834947213 is 312749438652.

256834947213 is a `hidden beast` number, since 2 + 5 + 6 + 83 + 494 + 72 + 1 + 3 = 666.

256834947213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256834947213 - 2¹ = 256834947211 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 256834947213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256834947211) 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 23 ways as a sum of consecutive naturals, for example, 8627545 + ... + 8657262.

Almost surely, 2^256834947213 is an apocalyptic number.

It is an amenable number.

256834947213 is a deficient number, since it is larger than the sum of its proper divisors (145831939955).

256834947213 is a wasteful number, since it uses less digits than its factorization.

256834947213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17284953 (or 17284950 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 256834947213 in words is "two hundred fifty-six billion, eight hundred thirty-four million, nine hundred forty-seven thousand, two hundred thirteen".