317506517609 has 4 divisors (see below), whose sum is σ = 336183371604. Its totient is φ = 298829663616.

The previous prime is 317506517591. The next prime is 317506517641. The reversal of 317506517609 is 906715605713.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906715605713 = 867653 ⋅1045021.

It can be written as a sum of positive squares in 2 ways, for example, as 278382864400 + 39123653209 = 527620^2 + 197797^2 .

It is a cyclic number.

It is not a de Polignac number, because 317506517609 - 2⁸ = 317506517353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (317506517509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9338426972 + ... + 9338427005.

It is an arithmetic number, because the mean of its divisors is an integer number (84045842901).

Almost surely, 2^317506517609 is an apocalyptic number.

It is an amenable number.

317506517609 is a deficient number, since it is larger than the sum of its proper divisors (18676853995).

317506517609 is a wasteful number, since it uses less digits than its factorization.

317506517609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18676853994.

The product of its (nonzero) digits is 1190700, while the sum is 50.

The spelling of 317506517609 in words is "three hundred seventeen billion, five hundred six million, five hundred seventeen thousand, six hundred nine".