256793559 has 8 divisors (see below), whose sum is σ = 373517952. Its totient is φ = 155632440.

The previous prime is 256793557. The next prime is 256793561. The reversal of 256793559 is 955397652.

It is an interprime number because it is at equal distance from previous prime (256793557) and next prime (256793561).

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

It is not a de Polignac number, because 256793559 - 2¹ = 256793557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256793557) 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 7 ways as a sum of consecutive naturals, for example, 3890779 + ... + 3890844.

It is an arithmetic number, because the mean of its divisors is an integer number (46689744).

Almost surely, 2^256793559 is an apocalyptic number.

256793559 is a deficient number, since it is larger than the sum of its proper divisors (116724393).

256793559 is a wasteful number, since it uses less digits than its factorization.

256793559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7781637.

The product of its digits is 2551500, while the sum is 51.

The square root of 256793559 is about 16024.7795304647. The cubic root of 256793559 is about 635.6158358963.

The spelling of 256793559 in words is "two hundred fifty-six million, seven hundred ninety-three thousand, five hundred fifty-nine".