256142235615 has 16 divisors (see below), whose sum is σ = 468374373888. Its totient is φ = 117093593376.

The previous prime is 256142235577. The next prime is 256142235617. The reversal of 256142235615 is 516532241652.

It is not a de Polignac number, because 256142235615 - 2¹⁰ = 256142234591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256142235617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1219724827 + ... + 1219725036.

It is an arithmetic number, because the mean of its divisors is an integer number (29273398368).

Almost surely, 2^256142235615 is an apocalyptic number.

256142235615 is a deficient number, since it is larger than the sum of its proper divisors (212232138273).

256142235615 is a wasteful number, since it uses less digits than its factorization.

256142235615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439449878.

The product of its digits is 432000, while the sum is 42.

The spelling of 256142235615 in words is "two hundred fifty-six billion, one hundred forty-two million, two hundred thirty-five thousand, six hundred fifteen".