165318563 has 8 divisors (see below), whose sum is σ = 174163200. Its totient is φ = 156488328.

The previous prime is 165318541. The next prime is 165318583. The reversal of 165318563 is 365813561.

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

It is a cyclic number.

It is not a de Polignac number, because 165318563 - 2⁶ = 165318499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165318583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26498 + ... + 32136.

It is an arithmetic number, because the mean of its divisors is an integer number (21770400).

Almost surely, 2^165318563 is an apocalyptic number.

165318563 is a deficient number, since it is larger than the sum of its proper divisors (8844637).

165318563 is a wasteful number, since it uses less digits than its factorization.

165318563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7201.

The product of its digits is 64800, while the sum is 38.

The square root of 165318563 is about 12857.6266472472. The cubic root of 165318563 is about 548.8334094184.

The spelling of 165318563 in words is "one hundred sixty-five million, three hundred eighteen thousand, five hundred sixty-three".