12165442147 has 16 divisors (see below), whose sum is σ = 12397214592. Its totient is φ = 11936448000.

The previous prime is 12165442057. The next prime is 12165442169. The reversal of 12165442147 is 74124456121.

It is a cyclic number.

It is not a de Polignac number, because 12165442147 - 2⁷ = 12165442019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12165442847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5182228 + ... + 5184574.

It is an arithmetic number, because the mean of its divisors is an integer number (774825912).

Almost surely, 2^12165442147 is an apocalyptic number.

12165442147 is a deficient number, since it is larger than the sum of its proper divisors (231772445).

12165442147 is a wasteful number, since it uses less digits than its factorization.

12165442147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2898.

The product of its digits is 53760, while the sum is 37.

Adding to 12165442147 its reverse (74124456121), we get a palindrome (86289898268).

The spelling of 12165442147 in words is "twelve billion, one hundred sixty-five million, four hundred forty-two thousand, one hundred forty-seven".