256835656411 has 4 divisors (see below), whose sum is σ = 256858007272. Its totient is φ = 256813305552.

The previous prime is 256835656367. The next prime is 256835656439. The reversal of 256835656411 is 114656538652.

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-256835656411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256835656211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11158185 + ... + 11181178.

It is an arithmetic number, because the mean of its divisors is an integer number (64214501818).

Almost surely, 2^256835656411 is an apocalyptic number.

256835656411 is a deficient number, since it is larger than the sum of its proper divisors (22350861).

256835656411 is a wasteful number, since it uses less digits than its factorization.

256835656411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22350860.

The product of its digits is 5184000, while the sum is 52.

The spelling of 256835656411 in words is "two hundred fifty-six billion, eight hundred thirty-five million, six hundred fifty-six thousand, four hundred eleven".