12871839564 has 36 divisors (see below), whose sum is σ = 32543425824. Its totient is φ = 4289785632.

The previous prime is 12871839557. The next prime is 12871839571. The reversal of 12871839564 is 46593817821.

12871839564 is a `hidden beast` number, since 1 + 2 + 8 + 71 + 8 + 3 + 9 + 564 = 666.

It is an interprime number because it is at equal distance from previous prime (12871839557) and next prime (12871839571).

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

It is a super-2 number, since 2×12871839564² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12871839564.

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, 171634 + ... + 234950.

Almost surely, 2^12871839564 is an apocalyptic number.

It is an amenable number.

12871839564 is an abundant number, since it is smaller than the sum of its proper divisors (19671586260).

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

12871839564 is a wasteful number, since it uses less digits than its factorization.

12871839564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68974 (or 68969 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 12871839564 in words is "twelve billion, eight hundred seventy-one million, eight hundred thirty-nine thousand, five hundred sixty-four".