256811159 has 8 divisors (see below), whose sum is σ = 284751120. Its totient is φ = 229636800.

The previous prime is 256811147. The next prime is 256811183. The reversal of 256811159 is 951118652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256811159 - 2⁴ = 256811143 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 (256811459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190694 + ... + 192035.

It is an arithmetic number, because the mean of its divisors is an integer number (35593890).

Almost surely, 2^256811159 is an apocalyptic number.

256811159 is a deficient number, since it is larger than the sum of its proper divisors (27939961).

256811159 is a wasteful number, since it uses less digits than its factorization.

256811159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382801.

The product of its digits is 21600, while the sum is 38.

The square root of 256811159 is about 16025.3286705765. The cubic root of 256811159 is about 635.6303567475.

The spelling of 256811159 in words is "two hundred fifty-six million, eight hundred eleven thousand, one hundred fifty-nine".