12315564434423 has 2 divisors, whose sum is σ = 12315564434424. Its totient is φ = 12315564434422.

The previous prime is 12315564434419. The next prime is 12315564434477. The reversal of 12315564434423 is 32443446551321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12315564434423 - 2² = 12315564434419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12315564434413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6157782217211 + 6157782217212.

It is an arithmetic number, because the mean of its divisors is an integer number (6157782217212).

Almost surely, 2^{12315564434423} is an apocalyptic number.

12315564434423 is a deficient number, since it is larger than the sum of its proper divisors (1).

12315564434423 is an equidigital number, since it uses as much as digits as its factorization.

12315564434423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4147200, while the sum is 47.

The spelling of 12315564434423 in words is "twelve trillion, three hundred fifteen billion, five hundred sixty-four million, four hundred thirty-four thousand, four hundred twenty-three".