256596189 has 4 divisors (see below), whose sum is σ = 342128256. Its totient is φ = 171064124.

The previous prime is 256596173. The next prime is 256596191. The reversal of 256596189 is 981695652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256596189 - 2⁴ = 256596173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256596139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42766029 + ... + 42766034.

It is an arithmetic number, because the mean of its divisors is an integer number (85532064).

Almost surely, 2^256596189 is an apocalyptic number.

It is an amenable number.

256596189 is a deficient number, since it is larger than the sum of its proper divisors (85532067).

256596189 is an equidigital number, since it uses as much as digits as its factorization.

256596189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85532066.

The product of its digits is 1166400, while the sum is 51.

The square root of 256596189 is about 16018.6200716541. The cubic root of 256596189 is about 635.4529506430.

The spelling of 256596189 in words is "two hundred fifty-six million, five hundred ninety-six thousand, one hundred eighty-nine".