1317406666809 has 8 divisors (see below), whose sum is σ = 1769363699040. Its totient is φ = 871860372896.

The previous prime is 1317406666789. The next prime is 1317406666883. The reversal of 1317406666809 is 9086666047131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1317406666809 - 2¹² = 1317406662713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1317406666909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1602684099 + ... + 1602684920.

It is an arithmetic number, because the mean of its divisors is an integer number (221170462380).

Almost surely, 2^{1317406666809} is an apocalyptic number.

It is an amenable number.

1317406666809 is a deficient number, since it is larger than the sum of its proper divisors (451957032231).

1317406666809 is a wasteful number, since it uses less digits than its factorization.

1317406666809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3205369159.

The product of its (nonzero) digits is 7838208, while the sum is 57.

The spelling of 1317406666809 in words is "one trillion, three hundred seventeen billion, four hundred six million, six hundred sixty-six thousand, eight hundred nine".