12256720235266 has 32 divisors (see below), whose sum is σ = 20491954484400. Its totient is φ = 5459240075520.

The previous prime is 12256720235261. The next prime is 12256720235273. The reversal of 12256720235266 is 66253202765221.

12256720235266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2793313885041 + 9463406350225 = 1671321^2 + 3076265^2 .

It is not an unprimeable number, because it can be changed into a prime (12256720235261) 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, 2368345 + ... + 5488396.

Almost surely, 2^{12256720235266} is an apocalyptic number.

12256720235266 is a deficient number, since it is larger than the sum of its proper divisors (8235234249134).

12256720235266 is a wasteful number, since it uses less digits than its factorization.

12256720235266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7858854.

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 12256720235266 in words is "twelve trillion, two hundred fifty-six billion, seven hundred twenty million, two hundred thirty-five thousand, two hundred sixty-six".