12315564434443 has 4 divisors (see below), whose sum is σ = 12316551824808. Its totient is φ = 12314577044080.

The previous prime is 12315564434423. The next prime is 12315564434477. The reversal of 12315564434443 is 34443446551321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12315564434443 - 2²⁵ = 12315530880011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12315564434413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493676473 + ... + 493701418.

It is an arithmetic number, because the mean of its divisors is an integer number (3079137956202).

Almost surely, 2^{12315564434443} is an apocalyptic number.

12315564434443 is a deficient number, since it is larger than the sum of its proper divisors (987390365).

12315564434443 is an equidigital number, since it uses as much as digits as its factorization.

12315564434443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987390364.

The product of its digits is 8294400, while the sum is 49.

The spelling of 12315564434443 in words is "twelve trillion, three hundred fifteen billion, five hundred sixty-four million, four hundred thirty-four thousand, four hundred forty-three".