12185975442749 has 2 divisors, whose sum is σ = 12185975442750. Its totient is φ = 12185975442748.

The previous prime is 12185975442743. The next prime is 12185975442761. The reversal of 12185975442749 is 94724457958121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7641254975524 + 4544720467225 = 2764282^2 + 2131835^2 .

It is a cyclic number.

It is not a de Polignac number, because 12185975442749 - 2²⁴ = 12185958665533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12185975442743) 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, 6092987721374 + 6092987721375.

It is an arithmetic number, because the mean of its divisors is an integer number (6092987721375).

Almost surely, 2^{12185975442749} is an apocalyptic number.

It is an amenable number.

12185975442749 is a deficient number, since it is larger than the sum of its proper divisors (1).

12185975442749 is an equidigital number, since it uses as much as digits as its factorization.

12185975442749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 203212800, while the sum is 68.

The spelling of 12185975442749 in words is "twelve trillion, one hundred eighty-five billion, nine hundred seventy-five million, four hundred forty-two thousand, seven hundred forty-nine".