165117170165 has 8 divisors (see below), whose sum is σ = 201879106488. Its totient is φ = 129601401280.

The previous prime is 165117170149. The next prime is 165117170263. The reversal of 165117170165 is 561071711561.

It can be written as a sum of positive squares in 4 ways, for example, as 65256746116 + 99860424049 = 255454^2 + 316007^2 .

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

It is not a de Polignac number, because 165117170165 - 2⁴ = 165117170149 is a prime.

It is a super-2 number, since 2×165117170165² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 311541566 + ... + 311542095.

It is an arithmetic number, because the mean of its divisors is an integer number (25234888311).

Almost surely, 2^165117170165 is an apocalyptic number.

It is an amenable number.

165117170165 is a deficient number, since it is larger than the sum of its proper divisors (36761936323).

165117170165 is an equidigital number, since it uses as much as digits as its factorization.

165117170165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623083719.

The product of its (nonzero) digits is 44100, while the sum is 41.

The spelling of 165117170165 in words is "one hundred sixty-five billion, one hundred seventeen million, one hundred seventy thousand, one hundred sixty-five".