12685416720289 has 4 divisors (see below), whose sum is σ = 12685427133120. Its totient is φ = 12685406307460.

The previous prime is 12685416720281. The next prime is 12685416720311. The reversal of 12685416720289 is 98202761458621.

12685416720289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12685416720289 - 2³ = 12685416720281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12685416720281) 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, 3093109 + ... + 5910850.

It is an arithmetic number, because the mean of its divisors is an integer number (3171356783280).

Almost surely, 2^{12685416720289} is an apocalyptic number.

It is an amenable number.

12685416720289 is a deficient number, since it is larger than the sum of its proper divisors (10412831).

12685416720289 is an equidigital number, since it uses as much as digits as its factorization.

12685416720289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10412830.

The product of its (nonzero) digits is 23224320, while the sum is 61.

The spelling of 12685416720289 in words is "twelve trillion, six hundred eighty-five billion, four hundred sixteen million, seven hundred twenty thousand, two hundred eighty-nine".