165863275317 has 12 divisors (see below), whose sum is σ = 248453630880. Its totient is φ = 110575516716.

The previous prime is 165863275313. The next prime is 165863275327. The reversal of 165863275317 is 713572368561.

165863275317 is a `hidden beast` number, since 1 + 6 + 5 + 86 + 3 + 27 + 531 + 7 = 666.

It is not a de Polignac number, because 165863275317 - 2² = 165863275313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165863275313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341282217 + ... + 341282702.

It is an arithmetic number, because the mean of its divisors is an integer number (20704469240).

Almost surely, 2^165863275317 is an apocalyptic number.

It is an amenable number.

165863275317 is a deficient number, since it is larger than the sum of its proper divisors (82590355563).

165863275317 is an frugal number, since it uses more digits than its factorization.

165863275317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682564934 (or 682564922 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The spelling of 165863275317 in words is "one hundred sixty-five billion, eight hundred sixty-three million, two hundred seventy-five thousand, three hundred seventeen".