256541307695 has 4 divisors (see below), whose sum is σ = 307849569240. Its totient is φ = 205233046152.

The previous prime is 256541307629. The next prime is 256541307721. The reversal of 256541307695 is 596703145652.

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 256541307695 - 2⁸ = 256541307439 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25654130765 + ... + 25654130774.

It is an arithmetic number, because the mean of its divisors is an integer number (76962392310).

Almost surely, 2^256541307695 is an apocalyptic number.

256541307695 is a deficient number, since it is larger than the sum of its proper divisors (51308261545).

256541307695 is an equidigital number, since it uses as much as digits as its factorization.

256541307695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51308261544.

The product of its (nonzero) digits is 6804000, while the sum is 53.

The spelling of 256541307695 in words is "two hundred fifty-six billion, five hundred forty-one million, three hundred seven thousand, six hundred ninety-five".