12195564472 has 128 divisors (see below), whose sum is σ = 29059430400. Its totient is φ = 4669516800.

The previous prime is 12195564449. The next prime is 12195564481. The reversal of 12195564472 is 27446559121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3908529 + ... + 3911647.

It is an arithmetic number, because the mean of its divisors is an integer number (227026800).

Almost surely, 2^12195564472 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 12195564472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14529715200).

12195564472 is an abundant number, since it is smaller than the sum of its proper divisors (16863865928).

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

12195564472 is a wasteful number, since it uses less digits than its factorization.

12195564472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317 (or 3313 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The spelling of 12195564472 in words is "twelve billion, one hundred ninety-five million, five hundred sixty-four thousand, four hundred seventy-two".