12156765567 has 4 divisors (see below), whose sum is σ = 16209020760. Its totient is φ = 8104510376.

The previous prime is 12156765559. The next prime is 12156765571. The reversal of 12156765567 is 76556765121.

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 12156765567 - 2³ = 12156765559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12156761567) 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 3 ways as a sum of consecutive naturals, for example, 2026127592 + ... + 2026127597.

It is an arithmetic number, because the mean of its divisors is an integer number (4052255190).

Almost surely, 2^12156765567 is an apocalyptic number.

12156765567 is a deficient number, since it is larger than the sum of its proper divisors (4052255193).

12156765567 is an equidigital number, since it uses as much as digits as its factorization.

12156765567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4052255192.

The product of its digits is 2646000, while the sum is 51.

The spelling of 12156765567 in words is "twelve billion, one hundred fifty-six million, seven hundred sixty-five thousand, five hundred sixty-seven".