12091115769 has 4 divisors (see below), whose sum is σ = 16121487696. Its totient is φ = 8060743844.

The previous prime is 12091115753. The next prime is 12091115789. The reversal of 12091115769 is 96751119021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12091115769 - 2⁴ = 12091115753 is a prime.

It is a super-2 number, since 2×12091115769² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12091115769.

It is not an unprimeable number, because it can be changed into a prime (12091115749) 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, 2015185959 + ... + 2015185964.

It is an arithmetic number, because the mean of its divisors is an integer number (4030371924).

Almost surely, 2^12091115769 is an apocalyptic number.

It is an amenable number.

12091115769 is a deficient number, since it is larger than the sum of its proper divisors (4030371927).

12091115769 is an equidigital number, since it uses as much as digits as its factorization.

12091115769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030371926.

The product of its (nonzero) digits is 34020, while the sum is 42.

The spelling of 12091115769 in words is "twelve billion, ninety-one million, one hundred fifteen thousand, seven hundred sixty-nine".