165616160505 has 32 divisors (see below), whose sum is σ = 268724252160. Its totient is φ = 87085689600.

The previous prime is 165616160497. The next prime is 165616160527. The reversal of 165616160505 is 505061616561.

It is not a de Polignac number, because 165616160505 - 2³ = 165616160497 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 730999 + ... + 930371.

It is an arithmetic number, because the mean of its divisors is an integer number (8397632880).

Almost surely, 2^165616160505 is an apocalyptic number.

165616160505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165616160505 is a deficient number, since it is larger than the sum of its proper divisors (103108091655).

165616160505 is a wasteful number, since it uses less digits than its factorization.

165616160505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200161.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 165616160505 in words is "one hundred sixty-five billion, six hundred sixteen million, one hundred sixty thousand, five hundred five".