12365631391 has 2 divisors, whose sum is σ = 12365631392. Its totient is φ = 12365631390.

The previous prime is 12365631359. The next prime is 12365631401. The reversal of 12365631391 is 19313656321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12365631391 - 2⁵ = 12365631359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12365631191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6182815695 + 6182815696.

It is an arithmetic number, because the mean of its divisors is an integer number (6182815696).

Almost surely, 2^12365631391 is an apocalyptic number.

12365631391 is a deficient number, since it is larger than the sum of its proper divisors (1).

12365631391 is an equidigital number, since it uses as much as digits as its factorization.

12365631391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 40.

The spelling of 12365631391 in words is "twelve billion, three hundred sixty-five million, six hundred thirty-one thousand, three hundred ninety-one".