256081359 has 32 divisors (see below), whose sum is σ = 360345600. Its totient is φ = 161568000.

The previous prime is 256081349. The next prime is 256081361. The reversal of 256081359 is 953180652.

It is not a de Polignac number, because 256081359 - 2⁵ = 256081327 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256081349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1286742 + ... + 1286940.

It is an arithmetic number, because the mean of its divisors is an integer number (11260800).

Almost surely, 2^256081359 is an apocalyptic number.

256081359 is a deficient number, since it is larger than the sum of its proper divisors (104264241).

256081359 is a wasteful number, since it uses less digits than its factorization.

256081359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 256081359 is about 16002.5422667775. The cubic root of 256081359 is about 635.0276789555.

The spelling of 256081359 in words is "two hundred fifty-six million, eighty-one thousand, three hundred fifty-nine".