12776944691 has 8 divisors (see below), whose sum is σ = 14731446624. Its totient is φ = 10854748800.

The previous prime is 12776944667. The next prime is 12776944709. The reversal of 12776944691 is 19644967721.

12776944691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12776944691 - 2⁶ = 12776944627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12776944651) 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 7 ways as a sum of consecutive naturals, for example, 8075660 + ... + 8077241.

It is an arithmetic number, because the mean of its divisors is an integer number (1841430828).

Almost surely, 2^12776944691 is an apocalyptic number.

12776944691 is a deficient number, since it is larger than the sum of its proper divisors (1954501933).

12776944691 is a wasteful number, since it uses less digits than its factorization.

12776944691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16153021.

The product of its digits is 4572288, while the sum is 56.

The spelling of 12776944691 in words is "twelve billion, seven hundred seventy-six million, nine hundred forty-four thousand, six hundred ninety-one".