12013555725729 has 24 divisors (see below), whose sum is σ = 17449776812520. Its totient is φ = 7964444775168.

The previous prime is 12013555725713. The next prime is 12013555725737. The reversal of 12013555725729 is 92752755531021.

It is a happy number.

12013555725729 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 35 + 557 + 2 + 57 + 2 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3240864057600 + 8772691668129 = 1800240^2 + 2961873^2 .

It is not a de Polignac number, because 12013555725729 - 2⁴ = 12013555725713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12013555725749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3464772 + ... + 6002645.

It is an arithmetic number, because the mean of its divisors is an integer number (727074033855).

Almost surely, 2^{12013555725729} is an apocalyptic number.

It is an amenable number.

12013555725729 is a deficient number, since it is larger than the sum of its proper divisors (5436221086791).

12013555725729 is a wasteful number, since it uses less digits than its factorization.

12013555725729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9468209 (or 9468206 counting only the distinct ones).

The product of its (nonzero) digits is 6615000, while the sum is 54.

The spelling of 12013555725729 in words is "twelve trillion, thirteen billion, five hundred fifty-five million, seven hundred twenty-five thousand, seven hundred twenty-nine".