12372185656549 has 2 divisors, whose sum is σ = 12372185656550. Its totient is φ = 12372185656548.

The previous prime is 12372185656531. The next prime is 12372185656703. The reversal of 12372185656549 is 94565658127321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6202640060100 + 6169545596449 = 2490510^2 + 2483857^2 .

It is a cyclic number.

It is not a de Polignac number, because 12372185656549 - 2⁷ = 12372185656421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12372185659549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6186092828274 + 6186092828275.

It is an arithmetic number, because the mean of its divisors is an integer number (6186092828275).

Almost surely, 2^{12372185656549} is an apocalyptic number.

It is an amenable number.

12372185656549 is a deficient number, since it is larger than the sum of its proper divisors (1).

12372185656549 is an equidigital number, since it uses as much as digits as its factorization.

12372185656549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864000, while the sum is 64.

The spelling of 12372185656549 in words is "twelve trillion, three hundred seventy-two billion, one hundred eighty-five million, six hundred fifty-six thousand, five hundred forty-nine".