12989618544 has 80 divisors (see below), whose sum is σ = 39133011200. Its totient is φ = 3711314880.

The previous prime is 12989618533. The next prime is 12989618581. The reversal of 12989618544 is 44581698921.

12989618544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378022 + ... + 410949.

It is an arithmetic number, because the mean of its divisors is an integer number (489162640).

Almost surely, 2^12989618544 is an apocalyptic number.

12989618544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12989618544 is an abundant number, since it is smaller than the sum of its proper divisors (26143392656).

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

12989618544 is an equidigital number, since it uses as much as digits as its factorization.

12989618544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789003 (or 788983 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 57.

The spelling of 12989618544 in words is "twelve billion, nine hundred eighty-nine million, six hundred eighteen thousand, five hundred forty-four".