256299237135 has 24 divisors (see below), whose sum is σ = 446484448800. Its totient is φ = 136006022592.

The previous prime is 256299237119. The next prime is 256299237163. The reversal of 256299237135 is 531732992652.

256299237135 is a `hidden beast` number, since 2 + 5 + 629 + 9 + 2 + 3 + 7 + 1 + 3 + 5 = 666.

It is not a de Polignac number, because 256299237135 - 2⁴ = 256299237119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14301444 + ... + 14319353.

It is an arithmetic number, because the mean of its divisors is an integer number (18603518700).

Almost surely, 2^256299237135 is an apocalyptic number.

256299237135 is a deficient number, since it is larger than the sum of its proper divisors (190185211665).

256299237135 is a wasteful number, since it uses less digits than its factorization.

256299237135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28621007 (or 28621004 counting only the distinct ones).

The product of its digits is 6123600, while the sum is 54.

The spelling of 256299237135 in words is "two hundred fifty-six billion, two hundred ninety-nine million, two hundred thirty-seven thousand, one hundred thirty-five".