12167227565 has 4 divisors (see below), whose sum is σ = 14600673084. Its totient is φ = 9733782048.

The previous prime is 12167227561. The next prime is 12167227591. The reversal of 12167227565 is 56572276121.

12167227565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56572276121 = 641 ⋅88256281.

It can be written as a sum of positive squares in 2 ways, for example, as 7086104041 + 5081123524 = 84179^2 + 71282^2 .

It is a cyclic number.

It is not a de Polignac number, because 12167227565 - 2² = 12167227561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12167227561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1216722752 + ... + 1216722761.

It is an arithmetic number, because the mean of its divisors is an integer number (3650168271).

Almost surely, 2^12167227565 is an apocalyptic number.

It is an amenable number.

12167227565 is a deficient number, since it is larger than the sum of its proper divisors (2433445519).

12167227565 is an equidigital number, since it uses as much as digits as its factorization.

12167227565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433445518.

The product of its digits is 352800, while the sum is 44.

The spelling of 12167227565 in words is "twelve billion, one hundred sixty-seven million, two hundred twenty-seven thousand, five hundred sixty-five".