12386317849 has 4 divisors (see below), whose sum is σ = 12457915236. Its totient is φ = 12314720464.

The previous prime is 12386317843. The next prime is 12386317859. The reversal of 12386317849 is 94871368321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9069133824 + 3317184025 = 95232^2 + 57595^2 .

It is a cyclic number.

It is not a de Polignac number, because 12386317849 - 2¹⁹ = 12385793561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12386317796 and 12386317805.

It is not an unprimeable number, because it can be changed into a prime (12386317843) 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, 35798434 + ... + 35798779.

It is an arithmetic number, because the mean of its divisors is an integer number (3114478809).

Almost surely, 2^12386317849 is an apocalyptic number.

It is an amenable number.

12386317849 is a deficient number, since it is larger than the sum of its proper divisors (71597387).

12386317849 is an equidigital number, since it uses as much as digits as its factorization.

12386317849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71597386.

The product of its digits is 1741824, while the sum is 52.

The spelling of 12386317849 in words is "twelve billion, three hundred eighty-six million, three hundred seventeen thousand, eight hundred forty-nine".