165113945 has 16 divisors (see below), whose sum is σ = 210325248. Its totient is φ = 124005120.

The previous prime is 165113939. The next prime is 165113953. The reversal of 165113945 is 549311561.

It is not a de Polignac number, because 165113945 - 2¹² = 165109849 is a prime.

It is a super-2 number, since 2×165113945² = 54525229666926050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34382 + ... + 38888.

It is an arithmetic number, because the mean of its divisors is an integer number (13145328).

Almost surely, 2^165113945 is an apocalyptic number.

It is an amenable number.

165113945 is a deficient number, since it is larger than the sum of its proper divisors (45211303).

165113945 is a wasteful number, since it uses less digits than its factorization.

165113945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960.

The product of its digits is 16200, while the sum is 35.

The square root of 165113945 is about 12849.6671163108. The cubic root of 165113945 is about 548.6068820060.

The spelling of 165113945 in words is "one hundred sixty-five million, one hundred thirteen thousand, nine hundred forty-five".