12868994889 has 6 divisors (see below), whose sum is σ = 18588548186. Its totient is φ = 8579329920.

The previous prime is 12868994813. The next prime is 12868994921. The reversal of 12868994889 is 98849986821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8407422864 + 4461572025 = 91692^2 + 66795^2 .

It is not a de Polignac number, because 12868994889 - 2¹¹ = 12868992841 is a prime.

It is a super-2 number, since 2×12868994889² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12868994989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 714944152 + ... + 714944169.

Almost surely, 2^12868994889 is an apocalyptic number.

It is an amenable number.

12868994889 is a deficient number, since it is larger than the sum of its proper divisors (5719553297).

12868994889 is a wasteful number, since it uses less digits than its factorization.

12868994889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429888327 (or 1429888324 counting only the distinct ones).

The product of its digits is 143327232, while the sum is 72.

The spelling of 12868994889 in words is "twelve billion, eight hundred sixty-eight million, nine hundred ninety-four thousand, eight hundred eighty-nine".