165168263 has 10 divisors (see below), whose sum is σ = 178962744. Its totient is φ = 152436648.

The previous prime is 165168187. The next prime is 165168271. The reversal of 165168263 is 362861561.

It is not a de Polignac number, because 165168263 - 2¹⁴ = 165151879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165167263) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 25670 + ... + 31452.

Almost surely, 2^165168263 is an apocalyptic number.

165168263 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

165168263 is a deficient number, since it is larger than the sum of its proper divisors (13794481).

165168263 is an frugal number, since it uses more digits than its factorization.

165168263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5835 (or 5796 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 165168263 is about 12851.7805381200. The cubic root of 165168263 is about 548.6670343279.

The spelling of 165168263 in words is "one hundred sixty-five million, one hundred sixty-eight thousand, two hundred sixty-three".