12165534443 has 2 divisors, whose sum is σ = 12165534444. Its totient is φ = 12165534442.

The previous prime is 12165534431. The next prime is 12165534467. The reversal of 12165534443 is 34443556121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12165534443 - 2⁴ = 12165534427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12165534397 and 12165534406.

It is not a weakly prime, because it can be changed into another prime (12165539443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6082767221 + 6082767222.

It is an arithmetic number, because the mean of its divisors is an integer number (6082767222).

Almost surely, 2^12165534443 is an apocalyptic number.

12165534443 is a deficient number, since it is larger than the sum of its proper divisors (1).

12165534443 is an equidigital number, since it uses as much as digits as its factorization.

12165534443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 38.

The spelling of 12165534443 in words is "twelve billion, one hundred sixty-five million, five hundred thirty-four thousand, four hundred forty-three".