12651543305 has 32 divisors (see below), whose sum is σ = 15518635776. Its totient is φ = 9900000000.

The previous prime is 12651543299. The next prime is 12651543343. The reversal of 12651543305 is 50334515621.

12651543305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12651543305 - 2¹² = 12651539209 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 19139675 + ... + 19140335.

It is an arithmetic number, because the mean of its divisors is an integer number (484957368).

Almost surely, 2^12651543305 is an apocalyptic number.

It is an amenable number.

12651543305 is a deficient number, since it is larger than the sum of its proper divisors (2867092471).

12651543305 is a wasteful number, since it uses less digits than its factorization.

12651543305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 12651543305 in words is "twelve billion, six hundred fifty-one million, five hundred forty-three thousand, three hundred five".