12840715967 has 4 divisors (see below), whose sum is σ = 12841386936. Its totient is φ = 12840045000.

The previous prime is 12840715891. The next prime is 12840715969. The reversal of 12840715967 is 76951704821.

It is a happy number.

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 12840715967 - 2²⁰ = 12839667391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840715969) 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, 305909 + ... + 345342.

It is an arithmetic number, because the mean of its divisors is an integer number (3210346734).

Almost surely, 2^12840715967 is an apocalyptic number.

12840715967 is a deficient number, since it is larger than the sum of its proper divisors (670969).

12840715967 is an equidigital number, since it uses as much as digits as its factorization.

12840715967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670968.

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 12840715967 in words is "twelve billion, eight hundred forty million, seven hundred fifteen thousand, nine hundred sixty-seven".