256025618 has 16 divisors (see below), whose sum is σ = 389321856. Its totient is φ = 126257040.

The previous prime is 256025617. The next prime is 256025647. The reversal of 256025618 is 816520652.

It is not an unprimeable number, because it can be changed into a prime (256025611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150380 + ... + 152072.

It is an arithmetic number, because the mean of its divisors is an integer number (24332616).

Almost surely, 2^256025618 is an apocalyptic number.

256025618 is a deficient number, since it is larger than the sum of its proper divisors (133296238).

256025618 is a wasteful number, since it uses less digits than its factorization.

256025618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 256025618 is about 16000.8005424729. The cubic root of 256025618 is about 634.9816003101.

The spelling of 256025618 in words is "two hundred fifty-six million, twenty-five thousand, six hundred eighteen".