12406721416 has 16 divisors (see below), whose sum is σ = 23346587340. Its totient is φ = 6180964800.

The previous prime is 12406721413. The next prime is 12406721423. The reversal of 12406721416 is 61412760421.

It can be written as a sum of positive squares in 2 ways, for example, as 11996820900 + 409900516 = 109530^2 + 20246^2 .

It is not an unprimeable number, because it can be changed into a prime (12406721413) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2797135 + ... + 2801566.

Almost surely, 2^12406721416 is an apocalyptic number.

It is an amenable number.

12406721416 is a deficient number, since it is larger than the sum of its proper divisors (10939865924).

12406721416 is a wasteful number, since it uses less digits than its factorization.

12406721416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5598984 (or 5598980 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 12406721416 in words is "twelve billion, four hundred six million, seven hundred twenty-one thousand, four hundred sixteen".