12081729458 has 6 divisors (see below), whose sum is σ = 18122827359. Its totient is φ = 6040787006.

The previous prime is 12081729421. The next prime is 12081729467. The reversal of 12081729458 is 85492718021.

12081729458 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6040864729 + 6040864729 = 77723^2 + 77723^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=77723.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 116585 + ... + 194307.

Almost surely, 2^12081729458 is an apocalyptic number.

12081729458 is a deficient number, since it is larger than the sum of its proper divisors (6041097901).

12081729458 is an frugal number, since it uses more digits than its factorization.

12081729458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155448 (or 77725 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 12081729458 in words is "twelve billion, eighty-one million, seven hundred twenty-nine thousand, four hundred fifty-eight".