12876391265 has 4 divisors (see below), whose sum is σ = 15451669524. Its totient is φ = 10301113008.

The previous prime is 12876391207. The next prime is 12876391271. The reversal of 12876391265 is 56219367821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56219367821 = 5237 ⋅10735033.

It can be written as a sum of positive squares in 2 ways, for example, as 8583651904 + 4292739361 = 92648^2 + 65519^2 .

It is a cyclic number.

It is not a de Polignac number, because 12876391265 - 2⁸ = 12876391009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287639122 + ... + 1287639131.

It is an arithmetic number, because the mean of its divisors is an integer number (3862917381).

Almost surely, 2^12876391265 is an apocalyptic number.

It is an amenable number.

12876391265 is a deficient number, since it is larger than the sum of its proper divisors (2575278259).

12876391265 is an equidigital number, since it uses as much as digits as its factorization.

12876391265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575278258.

The product of its digits is 1088640, while the sum is 50.

The spelling of 12876391265 in words is "twelve billion, eight hundred seventy-six million, three hundred ninety-one thousand, two hundred sixty-five".