12313723666549 has 2 divisors, whose sum is σ = 12313723666550. Its totient is φ = 12313723666548.

The previous prime is 12313723666483. The next prime is 12313723666561. The reversal of 12313723666549 is 94566632731321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8521395854449 + 3792327812100 = 2919143^2 + 1947390^2 .

It is an emirp because it is prime and its reverse (94566632731321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12313723666549 - 2⁷ = 12313723666421 is a prime.

It is a super-2 number, since 2×12313723666549² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12313723666493 and 12313723666502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12313723666579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156861833274 + 6156861833275.

It is an arithmetic number, because the mean of its divisors is an integer number (6156861833275).

Almost surely, 2^{12313723666549} is an apocalyptic number.

It is an amenable number.

12313723666549 is a deficient number, since it is larger than the sum of its proper divisors (1).

12313723666549 is an equidigital number, since it uses as much as digits as its factorization.

12313723666549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29393280, while the sum is 58.

The spelling of 12313723666549 in words is "twelve trillion, three hundred thirteen billion, seven hundred twenty-three million, six hundred sixty-six thousand, five hundred forty-nine".