12861520984 has 16 divisors (see below), whose sum is σ = 25970379120. Its totient is φ = 5936086560.

The previous prime is 12861520981. The next prime is 12861521009. The reversal of 12861520984 is 48902516821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12861520981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61834132 + ... + 61834339.

It is an arithmetic number, because the mean of its divisors is an integer number (1623148695).

Almost surely, 2^12861520984 is an apocalyptic number.

It is an amenable number.

12861520984 is an abundant number, since it is smaller than the sum of its proper divisors (13108858136).

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

12861520984 is a wasteful number, since it uses less digits than its factorization.

12861520984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123668490 (or 123668486 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 12861520984 in words is "twelve billion, eight hundred sixty-one million, five hundred twenty thousand, nine hundred eighty-four".