256678558 has 16 divisors (see below), whose sum is σ = 389606400. Its totient is φ = 126819000.

The previous prime is 256678553. The next prime is 256678559. The reversal of 256678558 is 855876652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256678553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57963 + ... + 62233.

It is an arithmetic number, because the mean of its divisors is an integer number (24350400).

Almost surely, 2^256678558 is an apocalyptic number.

256678558 is a deficient number, since it is larger than the sum of its proper divisors (132927842).

256678558 is a wasteful number, since it uses less digits than its factorization.

256678558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4623.

The product of its digits is 4032000, while the sum is 52.

The square root of 256678558 is about 16021.1909045489. The cubic root of 256678558 is about 635.5209381745.

It can be divided in two parts, 25667 and 8558, that added together give a square (34225 = 185²).

The spelling of 256678558 in words is "two hundred fifty-six million, six hundred seventy-eight thousand, five hundred fifty-eight".