256742712727343 has 16 divisors (see below), whose sum is σ = 268062236956800. Its totient is φ = 245680169358624.

The previous prime is 256742712727331. The next prime is 256742712727363. The reversal of 256742712727343 is 343727217247652.

It is a cyclic number.

It is not a de Polignac number, because 256742712727343 - 2¹⁴ = 256742712710959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256742712727363) 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, 80914793 + ... + 84027906.

It is an arithmetic number, because the mean of its divisors is an integer number (16753889809800).

Almost surely, 2^{256742712727343} is an apocalyptic number.

256742712727343 is a deficient number, since it is larger than the sum of its proper divisors (11319524229457).

256742712727343 is a wasteful number, since it uses less digits than its factorization.

256742712727343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164943478.

The product of its digits is 165957120, while the sum is 62.

The spelling of 256742712727343 in words is "two hundred fifty-six trillion, seven hundred forty-two billion, seven hundred twelve million, seven hundred twenty-seven thousand, three hundred forty-three".