12780181806 has 64 divisors (see below), whose sum is σ = 29505907200. Its totient is φ = 3614875776.

The previous prime is 12780181763. The next prime is 12780181807. The reversal of 12780181806 is 60818108721.

12780181806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12780181807) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2174640 + ... + 2180508.

It is an arithmetic number, because the mean of its divisors is an integer number (461029800).

Almost surely, 2^12780181806 is an apocalyptic number.

12780181806 is an abundant number, since it is smaller than the sum of its proper divisors (16725725394).

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

12780181806 is a wasteful number, since it uses less digits than its factorization.

12780181806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6393.

The product of its (nonzero) digits is 43008, while the sum is 42.

The spelling of 12780181806 in words is "twelve billion, seven hundred eighty million, one hundred eighty-one thousand, eight hundred six".