256116558 has 32 divisors (see below), whose sum is σ = 520609536. Its totient is φ = 83982528.

The previous prime is 256116541. The next prime is 256116559. The reversal of 256116558 is 855611652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256116559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325041 + ... + 325827.

It is an arithmetic number, because the mean of its divisors is an integer number (16269048).

Almost surely, 2^256116558 is an apocalyptic number.

256116558 is an abundant number, since it is smaller than the sum of its proper divisors (264492978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256116558 is a wasteful number, since it uses less digits than its factorization.

256116558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608.

The product of its digits is 72000, while the sum is 39.

The square root of 256116558 is about 16003.6420229896. The cubic root of 256116558 is about 635.0567729842.

The spelling of 256116558 in words is "two hundred fifty-six million, one hundred sixteen thousand, five hundred fifty-eight".