12886866238 has 4 divisors (see below), whose sum is σ = 19330299360. Its totient is φ = 6443433118.

The previous prime is 12886866217. The next prime is 12886866247. The reversal of 12886866238 is 83266868821.

12886866238 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 an emirpimes, since its reverse is a distinct semiprime: 83266868821 = 83 ⋅1003215287.

It is a super-2 number, since 2×12886866238² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 3221716558 + ... + 3221716561.

It is an arithmetic number, because the mean of its divisors is an integer number (4832574840).

Almost surely, 2^12886866238 is an apocalyptic number.

12886866238 is a deficient number, since it is larger than the sum of its proper divisors (6443433122).

12886866238 is an equidigital number, since it uses as much as digits as its factorization.

12886866238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443433121.

The product of its digits is 10616832, while the sum is 58.

The spelling of 12886866238 in words is "twelve billion, eight hundred eighty-six million, eight hundred sixty-six thousand, two hundred thirty-eight".