256361579 has 4 divisors (see below), whose sum is σ = 256750080. Its totient is φ = 255973080.

The previous prime is 256361543. The next prime is 256361587. The reversal of 256361579 is 975163652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256361579 - 2⁸ = 256361323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256361879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193259 + ... + 194580.

It is an arithmetic number, because the mean of its divisors is an integer number (64187520).

Almost surely, 2^256361579 is an apocalyptic number.

256361579 is a deficient number, since it is larger than the sum of its proper divisors (388501).

256361579 is an equidigital number, since it uses as much as digits as its factorization.

256361579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388500.

The product of its digits is 340200, while the sum is 44.

The square root of 256361579 is about 16011.2953567161. The cubic root of 256361579 is about 635.2592233226.

The spelling of 256361579 in words is "two hundred fifty-six million, three hundred sixty-one thousand, five hundred seventy-nine".