256366085 has 8 divisors (see below), whose sum is σ = 309599736. Its totient is φ = 203785920.

The previous prime is 256366067. The next prime is 256366109. The reversal of 256366085 is 580663652.

It can be written as a sum of positive squares in 4 ways, for example, as 66863329 + 189502756 = 8177^2 + 13766^2 .

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

It is not a de Polignac number, because 256366085 - 2¹⁴ = 256349701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162506 + ... + 164075.

It is an arithmetic number, because the mean of its divisors is an integer number (38699967).

Almost surely, 2^256366085 is an apocalyptic number.

It is an amenable number.

256366085 is a deficient number, since it is larger than the sum of its proper divisors (53233651).

256366085 is a wasteful number, since it uses less digits than its factorization.

256366085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326743.

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 256366085 is about 16011.4360692600. The cubic root of 256366085 is about 635.2629452289.

The spelling of 256366085 in words is "two hundred fifty-six million, three hundred sixty-six thousand, eighty-five".