12656331473 has 2 divisors, whose sum is σ = 12656331474. Its totient is φ = 12656331472.

The previous prime is 12656331461. The next prime is 12656331559. The reversal of 12656331473 is 37413365621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10565372944 + 2090958529 = 102788^2 + 45727^2 .

It is a cyclic number.

It is not a de Polignac number, because 12656331473 - 2⁸ = 12656331217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12656331473.

It is not a weakly prime, because it can be changed into another prime (12656331403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6328165736 + 6328165737.

It is an arithmetic number, because the mean of its divisors is an integer number (6328165737).

Almost surely, 2^12656331473 is an apocalyptic number.

It is an amenable number.

12656331473 is a deficient number, since it is larger than the sum of its proper divisors (1).

12656331473 is an equidigital number, since it uses as much as digits as its factorization.

12656331473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 41.

The spelling of 12656331473 in words is "twelve billion, six hundred fifty-six million, three hundred thirty-one thousand, four hundred seventy-three".