12626447689 has 4 divisors (see below), whose sum is σ = 13369179924. Its totient is φ = 11883715456.

The previous prime is 12626447641. The next prime is 12626447719. The reversal of 12626447689 is 98674462621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5868785664 + 6757662025 = 76608^2 + 82205^2 .

It is a cyclic number.

It is not a de Polignac number, because 12626447689 - 2²³ = 12618059081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12626447089) 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, 371366092 + ... + 371366125.

It is an arithmetic number, because the mean of its divisors is an integer number (3342294981).

Almost surely, 2^12626447689 is an apocalyptic number.

It is an amenable number.

12626447689 is a deficient number, since it is larger than the sum of its proper divisors (742732235).

12626447689 is an equidigital number, since it uses as much as digits as its factorization.

12626447689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742732234.

The product of its digits is 6967296, while the sum is 55.

The spelling of 12626447689 in words is "twelve billion, six hundred twenty-six million, four hundred forty-seven thousand, six hundred eighty-nine".