12684108385 has 16 divisors (see below), whose sum is σ = 16450970256. Its totient is φ = 9332898048.

The previous prime is 12684108373. The next prime is 12684108413. The reversal of 12684108385 is 58380148621.

It can be written as a sum of positive squares in 8 ways, for example, as 662959504 + 12021148881 = 25748^2 + 109641^2 .

It is a cyclic number.

It is not a de Polignac number, because 12684108385 - 2⁷ = 12684108257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334234 + ... + 370243.

It is an arithmetic number, because the mean of its divisors is an integer number (1028185641).

Almost surely, 2^12684108385 is an apocalyptic number.

It is an amenable number.

12684108385 is a deficient number, since it is larger than the sum of its proper divisors (3766861871).

12684108385 is a wasteful number, since it uses less digits than its factorization.

12684108385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704772.

The product of its (nonzero) digits is 368640, while the sum is 46.

The spelling of 12684108385 in words is "twelve billion, six hundred eighty-four million, one hundred eight thousand, three hundred eighty-five".