256604585 has 8 divisors (see below), whose sum is σ = 308242176. Its totient is φ = 205072560.

The previous prime is 256604507. The next prime is 256604587. The reversal of 256604585 is 585406652.

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

It is not a de Polignac number, because 256604585 - 2²² = 252410281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256604587) 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 7 ways as a sum of consecutive naturals, for example, 20939 + ... + 30848.

It is an arithmetic number, because the mean of its divisors is an integer number (38530272).

Almost surely, 2^256604585 is an apocalyptic number.

It is an amenable number.

256604585 is a deficient number, since it is larger than the sum of its proper divisors (51637591).

256604585 is an equidigital number, since it uses as much as digits as its factorization.

256604585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52783.

The product of its (nonzero) digits is 288000, while the sum is 41.

The square root of 256604585 is about 16018.8821395252. The cubic root of 256604585 is about 635.4598813835.

The spelling of 256604585 in words is "two hundred fifty-six million, six hundred four thousand, five hundred eighty-five".