12721807916 has 6 divisors (see below), whose sum is σ = 22263163860. Its totient is φ = 6360903956.

The previous prime is 12721807873. The next prime is 12721807919. The reversal of 12721807916 is 61970812721.

12721807916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12721807919) 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 as a sum of consecutive naturals, namely, 1590225986 + ... + 1590225993.

It is an arithmetic number, because the mean of its divisors is an integer number (3710527310).

Almost surely, 2^12721807916 is an apocalyptic number.

It is an amenable number.

12721807916 is a deficient number, since it is larger than the sum of its proper divisors (9541355944).

12721807916 is a wasteful number, since it uses less digits than its factorization.

12721807916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180451983 (or 3180451981 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 44.

The spelling of 12721807916 in words is "twelve billion, seven hundred twenty-one million, eight hundred seven thousand, nine hundred sixteen".