12667786432 has 112 divisors (see below), whose sum is σ = 29717788672. Its totient is φ = 5242890240.

The previous prime is 12667786363. The next prime is 12667786451. The reversal of 12667786432 is 23468776621.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 12667786432.

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, 12262588 + ... + 12263620.

Almost surely, 2^12667786432 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 12667786432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14858894336).

12667786432 is an abundant number, since it is smaller than the sum of its proper divisors (17050002240).

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

12667786432 is a wasteful number, since it uses less digits than its factorization.

12667786432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966 (or 1956 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 52.

The spelling of 12667786432 in words is "twelve billion, six hundred sixty-seven million, seven hundred eighty-six thousand, four hundred thirty-two".