165065743161 has 20 divisors (see below), whose sum is σ = 268996027344. Its totient is φ = 100039843800.

The previous prime is 165065743151. The next prime is 165065743177. The reversal of 165065743161 is 161347560561.

165065743161 is a `hidden beast` number, since 1 + 6 + 506 + 57 + 4 + 31 + 61 = 666.

It is not a de Polignac number, because 165065743161 - 2²¹ = 165063646009 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165065743151) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 92628595 + ... + 92630376.

Almost surely, 2^165065743161 is an apocalyptic number.

165065743161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165065743161 is a deficient number, since it is larger than the sum of its proper divisors (103930284183).

165065743161 is a wasteful number, since it uses less digits than its factorization.

165065743161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185258994 (or 185258985 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 165065743161 in words is "one hundred sixty-five billion, sixty-five million, seven hundred forty-three thousand, one hundred sixty-one".