256255804871 has 16 divisors (see below), whose sum is σ = 281427689088. Its totient is φ = 231399064800.

The previous prime is 256255804867. The next prime is 256255804957. The reversal of 256255804871 is 178408552652.

It is a happy number.

256255804871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 256255804871 - 2² = 256255804867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256255804811) 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 15 ways as a sum of consecutive naturals, for example, 2014460 + ... + 2137886.

It is an arithmetic number, because the mean of its divisors is an integer number (17589230568).

Almost surely, 2^256255804871 is an apocalyptic number.

256255804871 is a deficient number, since it is larger than the sum of its proper divisors (25171884217).

256255804871 is a wasteful number, since it uses less digits than its factorization.

256255804871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124702.

The product of its (nonzero) digits is 5376000, while the sum is 53.

The spelling of 256255804871 in words is "two hundred fifty-six billion, two hundred fifty-five million, eight hundred four thousand, eight hundred seventy-one".