12936016781 has 2 divisors, whose sum is σ = 12936016782. Its totient is φ = 12936016780.

The previous prime is 12936016741. The next prime is 12936016787. The reversal of 12936016781 is 18761063921.

12936016781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10078152100 + 2857864681 = 100390^2 + 53459^2 .

It is an emirp because it is prime and its reverse (18761063921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12936016781 is a prime.

It is a super-2 number, since 2×12936016781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12936016787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6468008390 + 6468008391.

It is an arithmetic number, because the mean of its divisors is an integer number (6468008391).

Almost surely, 2^12936016781 is an apocalyptic number.

It is an amenable number.

12936016781 is a deficient number, since it is larger than the sum of its proper divisors (1).

12936016781 is an equidigital number, since it uses as much as digits as its factorization.

12936016781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 12936016781 in words is "twelve billion, nine hundred thirty-six million, sixteen thousand, seven hundred eighty-one".