12774991919777 has 4 divisors (see below), whose sum is σ = 12777019380756. Its totient is φ = 12772964458800.

The previous prime is 12774991919741. The next prime is 12774991919783. The reversal of 12774991919777 is 77791919947721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6876121639696 + 5898870280081 = 2622236^2 + 2428759^2 .

It is a cyclic number.

It is not a de Polignac number, because 12774991919777 - 2¹² = 12774991915681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12774991919737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1013721038 + ... + 1013733639.

It is an arithmetic number, because the mean of its divisors is an integer number (3194254845189).

Almost surely, 2^{12774991919777} is an apocalyptic number.

It is an amenable number.

12774991919777 is a deficient number, since it is larger than the sum of its proper divisors (2027460979).

12774991919777 is an equidigital number, since it uses as much as digits as its factorization.

12774991919777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027460978.

The product of its digits is 882165816, while the sum is 80.

The spelling of 12774991919777 in words is "twelve trillion, seven hundred seventy-four billion, nine hundred ninety-one million, nine hundred nineteen thousand, seven hundred seventy-seven".