545665161 has 16 divisors (see below), whose sum is σ = 767787840. Its totient is φ = 343756800.

The previous prime is 545665151. The next prime is 545665163. The reversal of 545665161 is 161566545.

It is not a de Polignac number, because 545665161 - 2⁵ = 545665129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (545665163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10921 + ... + 34793.

It is an arithmetic number, because the mean of its divisors is an integer number (47986740).

Almost surely, 2^545665161 is an apocalyptic number.

It is an amenable number.

545665161 is a deficient number, since it is larger than the sum of its proper divisors (222122679).

545665161 is a wasteful number, since it uses less digits than its factorization.

545665161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24296.

The product of its digits is 108000, while the sum is 39.

The square root of 545665161 is about 23359.4768991088. The cubic root of 545665161 is about 817.1630902297.

The spelling of 545665161 in words is "five hundred forty-five million, six hundred sixty-five thousand, one hundred sixty-one".