256013645842 has 8 divisors (see below), whose sum is σ = 406609908156. Its totient is φ = 120477009792.

The previous prime is 256013645803. The next prime is 256013645843. The reversal of 256013645842 is 248546310652.

It is a happy number.

256013645842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 240679529281 + 15334116561 = 490591^2 + 123831^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 256013645792 and 256013645801.

It is not an unprimeable number, because it can be changed into a prime (256013645843) 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 3 ways as a sum of consecutive naturals, for example, 3764906523 + ... + 3764906590.

Almost surely, 2^256013645842 is an apocalyptic number.

256013645842 is a deficient number, since it is larger than the sum of its proper divisors (150596262314).

256013645842 is a wasteful number, since it uses less digits than its factorization.

256013645842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7529813132.

The product of its (nonzero) digits is 1382400, while the sum is 46.

The spelling of 256013645842 in words is "two hundred fifty-six billion, thirteen million, six hundred forty-five thousand, eight hundred forty-two".