12645838009 has 16 divisors (see below), whose sum is σ = 14509123200. Its totient is φ = 10796817024.

The previous prime is 12645837979. The next prime is 12645838013. The reversal of 12645838009 is 90083854621.

It is not a de Polignac number, because 12645838009 - 2⁵ = 12645837977 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 12645838009.

It is not an unprimeable number, because it can be changed into a prime (12645838069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2330902 + ... + 2336320.

It is an arithmetic number, because the mean of its divisors is an integer number (906820200).

Almost surely, 2^12645838009 is an apocalyptic number.

It is an amenable number.

12645838009 is a deficient number, since it is larger than the sum of its proper divisors (1863285191).

12645838009 is an equidigital number, since it uses as much as digits as its factorization.

12645838009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 12645838009 in words is "twelve billion, six hundred forty-five million, eight hundred thirty-eight thousand, nine".