12861019884 has 48 divisors (see below), whose sum is σ = 30881910528. Its totient is φ = 4162776768.

The previous prime is 12861019883. The next prime is 12861019889. The reversal of 12861019884 is 48891016821.

It is not an unprimeable number, because it can be changed into a prime (12861019883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194539 + ... + 252125.

It is an arithmetic number, because the mean of its divisors is an integer number (643373136).

Almost surely, 2^12861019884 is an apocalyptic number.

It is an amenable number.

12861019884 is an abundant number, since it is smaller than the sum of its proper divisors (18020890644).

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

12861019884 is a wasteful number, since it uses less digits than its factorization.

12861019884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58134 (or 58132 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 48.

The spelling of 12861019884 in words is "twelve billion, eight hundred sixty-one million, nineteen thousand, eight hundred eighty-four".