12650869865 has 8 divisors (see below), whose sum is σ = 15188991048. Its totient is φ = 10115397760.

The previous prime is 12650869843. The next prime is 12650869871. The reversal of 12650869865 is 56896805621.

12650869865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7930080601 + 4720789264 = 89051^2 + 68708^2 .

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

It is not a de Polignac number, because 12650869865 - 2¹² = 12650865769 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 12650869865.

It is an unprimeable number.

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, 651746 + ... + 670875.

It is an arithmetic number, because the mean of its divisors is an integer number (1898623881).

Almost surely, 2^12650869865 is an apocalyptic number.

It is an amenable number.

12650869865 is a deficient number, since it is larger than the sum of its proper divisors (2538121183).

12650869865 is a wasteful number, since it uses less digits than its factorization.

12650869865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324539.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 12650869865 in words is "twelve billion, six hundred fifty million, eight hundred sixty-nine thousand, eight hundred sixty-five".