165416518 has 4 divisors (see below), whose sum is σ = 248124780. Its totient is φ = 82708258.

The previous prime is 165416513. The next prime is 165416597. The reversal of 165416518 is 815614561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 815614561 = 367 ⋅2222383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165416513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41354128 + ... + 41354131.

It is an arithmetic number, because the mean of its divisors is an integer number (62031195).

Almost surely, 2^165416518 is an apocalyptic number.

165416518 is a deficient number, since it is larger than the sum of its proper divisors (82708262).

165416518 is an equidigital number, since it uses as much as digits as its factorization.

165416518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82708261.

The product of its digits is 28800, while the sum is 37.

The square root of 165416518 is about 12861.4353009297. The cubic root of 165416518 is about 548.9417867657.

The spelling of 165416518 in words is "one hundred sixty-five million, four hundred sixteen thousand, five hundred eighteen".