165105161165 has 24 divisors (see below), whose sum is σ = 231145378560. Its totient is φ = 113214910032.

The previous prime is 165105161149. The next prime is 165105161203. The reversal of 165105161165 is 561161501561.

It is a happy number.

It is not a de Polignac number, because 165105161165 - 2⁴ = 165105161149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 898325 + ... + 1066394.

It is an arithmetic number, because the mean of its divisors is an integer number (9631057440).

Almost surely, 2^165105161165 is an apocalyptic number.

It is an amenable number.

165105161165 is a deficient number, since it is larger than the sum of its proper divisors (66040217395).

165105161165 is an frugal number, since it uses more digits than its factorization.

165105161165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964759 (or 1964731 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 165105161165 in words is "one hundred sixty-five billion, one hundred five million, one hundred sixty-one thousand, one hundred sixty-five".