256726740320337 has 16 divisors (see below), whose sum is σ = 392537814560640. Its totient is φ = 146200308477312.

The previous prime is 256726740320261. The next prime is 256726740320371. The reversal of 256726740320337 is 733023047627652.

It is not a de Polignac number, because 256726740320337 - 2¹⁵ = 256726740287569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256726740320377) 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, 20861910012 + ... + 20861922317.

It is an arithmetic number, because the mean of its divisors is an integer number (24533613410040).

Almost surely, 2^{256726740320337} is an apocalyptic number.

It is an amenable number.

256726740320337 is a deficient number, since it is larger than the sum of its proper divisors (135811074240303).

256726740320337 is a wasteful number, since it uses less digits than its factorization.

256726740320337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41723832632.

The product of its (nonzero) digits is 53343360, while the sum is 57.

Adding to 256726740320337 its reverse (733023047627652), we get a palindrome (989749787947989).

The spelling of 256726740320337 in words is "two hundred fifty-six trillion, seven hundred twenty-six billion, seven hundred forty million, three hundred twenty thousand, three hundred thirty-seven".