12777045187 has 4 divisors (see below), whose sum is σ = 12779234776. Its totient is φ = 12774855600.

The previous prime is 12777045107. The next prime is 12777045191. The reversal of 12777045187 is 78154077721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78154077721 = 1187 ⋅65841683.

It is a cyclic number.

It is not a de Polignac number, because 12777045187 - 2⁷ = 12777045059 is a prime.

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 12777045187.

It is not an unprimeable number, because it can be changed into a prime (12777045107) 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, 1086018 + ... + 1097719.

It is an arithmetic number, because the mean of its divisors is an integer number (3194808694).

Almost surely, 2^12777045187 is an apocalyptic number.

12777045187 is a deficient number, since it is larger than the sum of its proper divisors (2189589).

12777045187 is an equidigital number, since it uses as much as digits as its factorization.

12777045187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189588.

The product of its (nonzero) digits is 768320, while the sum is 49.

The spelling of 12777045187 in words is "twelve billion, seven hundred seventy-seven million, forty-five thousand, one hundred eighty-seven".