12869561015 has 4 divisors (see below), whose sum is σ = 15443473224. Its totient is φ = 10295648808.

The previous prime is 12869561011. The next prime is 12869561063. The reversal of 12869561015 is 51016596821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51016596821 = 89 ⋅573220189.

It is a cyclic number.

It is not a de Polignac number, because 12869561015 - 2² = 12869561011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12869561011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1286956097 + ... + 1286956106.

It is an arithmetic number, because the mean of its divisors is an integer number (3860868306).

Almost surely, 2^12869561015 is an apocalyptic number.

12869561015 is a deficient number, since it is larger than the sum of its proper divisors (2573912209).

12869561015 is an equidigital number, since it uses as much as digits as its factorization.

12869561015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573912208.

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 12869561015 in words is "twelve billion, eight hundred sixty-nine million, five hundred sixty-one thousand, fifteen".