12189890544 has 80 divisors (see below), whose sum is σ = 33969825792. Its totient is φ = 3744440064.

The previous prime is 12189890539. The next prime is 12189890597. The reversal of 12189890544 is 44509898121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 362677 + ... + 394859.

Almost surely, 2^12189890544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12189890544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16984912896).

12189890544 is an abundant number, since it is smaller than the sum of its proper divisors (21779935248).

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

12189890544 is a wasteful number, since it uses less digits than its factorization.

12189890544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32814 (or 32808 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 51.

The spelling of 12189890544 in words is "twelve billion, one hundred eighty-nine million, eight hundred ninety thousand, five hundred forty-four".