12656331403 has 2 divisors, whose sum is σ = 12656331404. Its totient is φ = 12656331402.

The previous prime is 12656331323. The next prime is 12656331439. The reversal of 12656331403 is 30413365621.

It is a strong prime.

It is an emirp because it is prime and its reverse (30413365621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12656331403 - 2³³ = 4066396811 is a prime.

It is not a weakly prime, because it can be changed into another prime (12656331473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6328165701 + 6328165702.

It is an arithmetic number, because the mean of its divisors is an integer number (6328165702).

Almost surely, 2^12656331403 is an apocalyptic number.

12656331403 is a deficient number, since it is larger than the sum of its proper divisors (1).

12656331403 is an equidigital number, since it uses as much as digits as its factorization.

12656331403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 12656331403 in words is "twelve billion, six hundred fifty-six million, three hundred thirty-one thousand, four hundred three".