256712261671726 has 32 divisors (see below), whose sum is σ = 445404682695168. Its totient is φ = 108688055839200.

The previous prime is 256712261671721. The next prime is 256712261671751. The reversal of 256712261671726 is 627176162217652.

It is a super-2 number, since 2×256712261671726² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256712261671721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15229951 + ... + 27301573.

It is an arithmetic number, because the mean of its divisors is an integer number (13918896334224).

Almost surely, 2^{256712261671726} is an apocalyptic number.

256712261671726 is a deficient number, since it is larger than the sum of its proper divisors (188692421023442).

256712261671726 is a wasteful number, since it uses less digits than its factorization.

256712261671726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12090016.

The product of its digits is 35562240, while the sum is 61.

The spelling of 256712261671726 in words is "two hundred fifty-six trillion, seven hundred twelve billion, two hundred sixty-one million, six hundred seventy-one thousand, seven hundred twenty-six".