12693407809 has 4 divisors (see below), whose sum is σ = 12718846000. Its totient is φ = 12667969620.

The previous prime is 12693407743. The next prime is 12693407813. The reversal of 12693407809 is 90870439621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12693407809 - 2¹³ = 12693399617 is a prime.

It is a super-2 number, since 2×12693407809² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12693407899) 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, 12718347 + ... + 12719344.

It is an arithmetic number, because the mean of its divisors is an integer number (3179711500).

Almost surely, 2^12693407809 is an apocalyptic number.

It is an amenable number.

12693407809 is a deficient number, since it is larger than the sum of its proper divisors (25438191).

12693407809 is an equidigital number, since it uses as much as digits as its factorization.

12693407809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25438190.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 12693407809 in words is "twelve billion, six hundred ninety-three million, four hundred seven thousand, eight hundred nine".