256436052695 has 4 divisors (see below), whose sum is σ = 307723263240. Its totient is φ = 205148842152.

The previous prime is 256436052689. The next prime is 256436052727. The reversal of 256436052695 is 596250634652.

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

It is a cyclic number.

It is not a de Polignac number, because 256436052695 - 2¹⁰ = 256436051671 is a prime.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 25643605265 + ... + 25643605274.

It is an arithmetic number, because the mean of its divisors is an integer number (76930815810).

Almost surely, 2^256436052695 is an apocalyptic number.

256436052695 is a deficient number, since it is larger than the sum of its proper divisors (51287210545).

256436052695 is an equidigital number, since it uses as much as digits as its factorization.

256436052695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51287210544.

The product of its (nonzero) digits is 11664000, while the sum is 53.

The spelling of 256436052695 in words is "two hundred fifty-six billion, four hundred thirty-six million, fifty-two thousand, six hundred ninety-five".