12143545691 has 2 divisors, whose sum is σ = 12143545692. Its totient is φ = 12143545690.

The previous prime is 12143545679. The next prime is 12143545699. The reversal of 12143545691 is 19654534121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12143545691 - 2¹⁸ = 12143283547 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12143545699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6071772845 + 6071772846.

It is an arithmetic number, because the mean of its divisors is an integer number (6071772846).

Almost surely, 2^12143545691 is an apocalyptic number.

12143545691 is a deficient number, since it is larger than the sum of its proper divisors (1).

12143545691 is an equidigital number, since it uses as much as digits as its factorization.

12143545691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 41.

The spelling of 12143545691 in words is "twelve billion, one hundred forty-three million, five hundred forty-five thousand, six hundred ninety-one".