1317634949165 has 4 divisors (see below), whose sum is σ = 1581161939004. Its totient is φ = 1054107959328.

The previous prime is 1317634949149. The next prime is 1317634949167. The reversal of 1317634949165 is 5619494367131.

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 836268183529 + 481366765636 = 914477^2 + 693806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317634949165 - 2⁴ = 1317634949149 is a prime.

It is a super-2 number, since 2×1317634949165² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317634949167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131763494912 + ... + 131763494921.

It is an arithmetic number, because the mean of its divisors is an integer number (395290484751).

Almost surely, 2^{1317634949165} is an apocalyptic number.

It is an amenable number.

1317634949165 is a deficient number, since it is larger than the sum of its proper divisors (263526989839).

1317634949165 is an equidigital number, since it uses as much as digits as its factorization.

1317634949165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263526989838.

The product of its digits is 14696640, while the sum is 59.

The spelling of 1317634949165 in words is "one trillion, three hundred seventeen billion, six hundred thirty-four million, nine hundred forty-nine thousand, one hundred sixty-five".