256724706744238 has 16 divisors (see below), whose sum is σ = 385118272549440. Its totient is φ = 128351949623136.

The previous prime is 256724706744229. The next prime is 256724706744301. The reversal of 256724706744238 is 832447607427652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2143367320 + ... + 2143487092.

It is an arithmetic number, because the mean of its divisors is an integer number (24069892034340).

Almost surely, 2^{256724706744238} is an apocalyptic number.

256724706744238 is a deficient number, since it is larger than the sum of its proper divisors (128393565805202).

256724706744238 is a wasteful number, since it uses less digits than its factorization.

256724706744238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197691.

The product of its (nonzero) digits is 758661120, while the sum is 67.

The spelling of 256724706744238 in words is "two hundred fifty-six trillion, seven hundred twenty-four billion, seven hundred six million, seven hundred forty-four thousand, two hundred thirty-eight".