11936437779913 has 2 divisors, whose sum is σ = 11936437779914. Its totient is φ = 11936437779912.

The previous prime is 11936437779829. The next prime is 11936437779919. The reversal of 11936437779913 is 31997773463911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8665505100729 + 3270932679184 = 2943723^2 + 1808572^2 .

It is an emirp because it is prime and its reverse (31997773463911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11936437779913 - 2²¹ = 11936435682761 is a prime.

It is not a weakly prime, because it can be changed into another prime (11936437779919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5968218889956 + 5968218889957.

It is an arithmetic number, because the mean of its divisors is an integer number (5968218889957).

Almost surely, 2^{11936437779913} is an apocalyptic number.

It is an amenable number.

11936437779913 is a deficient number, since it is larger than the sum of its proper divisors (1).

11936437779913 is an equidigital number, since it uses as much as digits as its factorization.

11936437779913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162030456, while the sum is 70.

The spelling of 11936437779913 in words is "eleven trillion, nine hundred thirty-six billion, four hundred thirty-seven million, seven hundred seventy-nine thousand, nine hundred thirteen".