12634327309 has 4 divisors (see below), whose sum is σ = 12764578204. Its totient is φ = 12504076416.

The previous prime is 12634327217. The next prime is 12634327337. The reversal of 12634327309 is 90372343621.

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 8573834025 + 4060493284 = 92595^2 + 63722^2 .

It is a cyclic number.

It is not a de Polignac number, because 12634327309 - 2⁹ = 12634326797 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 (12634324309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65125302 + ... + 65125495.

It is an arithmetic number, because the mean of its divisors is an integer number (3191144551).

Almost surely, 2^12634327309 is an apocalyptic number.

It is an amenable number.

12634327309 is a deficient number, since it is larger than the sum of its proper divisors (130250895).

12634327309 is an equidigital number, since it uses as much as digits as its factorization.

12634327309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130250894.

The product of its (nonzero) digits is 163296, while the sum is 40.

The spelling of 12634327309 in words is "twelve billion, six hundred thirty-four million, three hundred twenty-seven thousand, three hundred nine".