12789543651 has 4 divisors (see below), whose sum is σ = 17052724872. Its totient is φ = 8526362432.

The previous prime is 12789543647. The next prime is 12789543653. The reversal of 12789543651 is 15634598721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12789543651 - 2² = 12789543647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12789543594 and 12789543603.

It is not an unprimeable number, because it can be changed into a prime (12789543653) 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, 2131590606 + ... + 2131590611.

It is an arithmetic number, because the mean of its divisors is an integer number (4263181218).

Almost surely, 2^12789543651 is an apocalyptic number.

12789543651 is a deficient number, since it is larger than the sum of its proper divisors (4263181221).

12789543651 is an equidigital number, since it uses as much as digits as its factorization.

12789543651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263181220.

The product of its digits is 1814400, while the sum is 51.

The spelling of 12789543651 in words is "twelve billion, seven hundred eighty-nine million, five hundred forty-three thousand, six hundred fifty-one".