12684400772 has 12 divisors (see below), whose sum is σ = 22510345536. Its totient is φ = 6252873480.

The previous prime is 12684400769. The next prime is 12684400777. The reversal of 12684400772 is 27700448621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12684400777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22331408 + ... + 22331975.

It is an arithmetic number, because the mean of its divisors is an integer number (1875862128).

Almost surely, 2^12684400772 is an apocalyptic number.

It is an amenable number.

12684400772 is a deficient number, since it is larger than the sum of its proper divisors (9825944764).

12684400772 is a wasteful number, since it uses less digits than its factorization.

12684400772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44663458 (or 44663456 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 41.

The spelling of 12684400772 in words is "twelve billion, six hundred eighty-four million, four hundred thousand, seven hundred seventy-two".