12191545884 has 48 divisors (see below), whose sum is σ = 32523158528. Its totient is φ = 3481973568.

The previous prime is 12191545819. The next prime is 12191545901. The reversal of 12191545884 is 48854519121.

12191545884 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, 206202 + ... + 258654.

Almost surely, 2^12191545884 is an apocalyptic number.

12191545884 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12191545884 is an abundant number, since it is smaller than the sum of its proper divisors (20331612644).

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

12191545884 is a wasteful number, since it uses less digits than its factorization.

12191545884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55234 (or 55232 counting only the distinct ones).

The product of its digits is 460800, while the sum is 48.

The spelling of 12191545884 in words is "twelve billion, one hundred ninety-one million, five hundred forty-five thousand, eight hundred eighty-four".