12864416857 has 8 divisors (see below), whose sum is σ = 13005808200. Its totient is φ = 12723450624.

The previous prime is 12864416753. The next prime is 12864416863. The reversal of 12864416857 is 75861446821.

It can be written as a sum of positive squares in 4 ways, for example, as 4190102361 + 8674314496 = 64731^2 + 93136^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12864416857 - 2⁷ = 12864416729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12864410857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45232 + ... + 166657.

It is an arithmetic number, because the mean of its divisors is an integer number (1625726025).

Almost surely, 2^12864416857 is an apocalyptic number.

It is an amenable number.

12864416857 is a deficient number, since it is larger than the sum of its proper divisors (141391343).

12864416857 is a wasteful number, since it uses less digits than its factorization.

12864416857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212555.

The product of its digits is 2580480, while the sum is 52.

The spelling of 12864416857 in words is "twelve billion, eight hundred sixty-four million, four hundred sixteen thousand, eight hundred fifty-seven".