12639356143 has 4 divisors (see below), whose sum is σ = 13075196040. Its totient is φ = 12203516248.

The previous prime is 12639356033. The next prime is 12639356159. The reversal of 12639356143 is 34165393621.

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 12639356143 - 2¹³ = 12639347951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12639356143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12639356173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217919905 + ... + 217919962.

It is an arithmetic number, because the mean of its divisors is an integer number (3268799010).

Almost surely, 2^12639356143 is an apocalyptic number.

12639356143 is a deficient number, since it is larger than the sum of its proper divisors (435839897).

12639356143 is an equidigital number, since it uses as much as digits as its factorization.

12639356143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435839896.

The product of its digits is 349920, while the sum is 43.

The spelling of 12639356143 in words is "twelve billion, six hundred thirty-nine million, three hundred fifty-six thousand, one hundred forty-three".