12789041691 has 4 divisors (see below), whose sum is σ = 17052055592. Its totient is φ = 8526027792.

The previous prime is 12789041687. The next prime is 12789041711. The reversal of 12789041691 is 19614098721.

12789041691 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.

It is not a de Polignac number, because 12789041691 - 2² = 12789041687 is a prime.

It is a super-2 number, since 2×12789041691² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12789041691.

It is not an unprimeable number, because it can be changed into a prime (12789041641) 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, 2131506946 + ... + 2131506951.

It is an arithmetic number, because the mean of its divisors is an integer number (4263013898).

Almost surely, 2^12789041691 is an apocalyptic number.

12789041691 is a deficient number, since it is larger than the sum of its proper divisors (4263013901).

12789041691 is an equidigital number, since it uses as much as digits as its factorization.

12789041691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263013900.

The product of its (nonzero) digits is 217728, while the sum is 48.

The spelling of 12789041691 in words is "twelve billion, seven hundred eighty-nine million, forty-one thousand, six hundred ninety-one".