12989879316 has 36 divisors (see below), whose sum is σ = 34767031572. Its totient is φ = 4075256064.

The previous prime is 12989879297. The next prime is 12989879347. The reversal of 12989879316 is 61397898921.

It can be written as a sum of positive squares in 2 ways, for example, as 11157696900 + 1832182416 = 105630^2 + 42804^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10612035 + ... + 10613258.

It is an arithmetic number, because the mean of its divisors is an integer number (965750877).

Almost surely, 2^12989879316 is an apocalyptic number.

It is an amenable number.

12989879316 is an abundant number, since it is smaller than the sum of its proper divisors (21777152256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12989879316 is a wasteful number, since it uses less digits than its factorization.

12989879316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21225320 (or 21225315 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The spelling of 12989879316 in words is "twelve billion, nine hundred eighty-nine million, eight hundred seventy-nine thousand, three hundred sixteen".