85928169609 has 18 divisors (see below), whose sum is σ = 128251457178. Its totient is φ = 55437523200.

The previous prime is 85928169601. The next prime is 85928169619. The reversal of 85928169609 is 90696182958.

85928169609 is a `hidden beast` number, since 8 + 5 + 9 + 2 + 8 + 16 + 9 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 84679254009 + 1248915600 = 290997^2 + 35340^2 .

It is not a de Polignac number, because 85928169609 - 2³ = 85928169601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85928169601) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4958872 + ... + 4976169.

Almost surely, 2^85928169609 is an apocalyptic number.

It is an amenable number.

85928169609 is a deficient number, since it is larger than the sum of its proper divisors (42323287569).

85928169609 is a wasteful number, since it uses less digits than its factorization.

85928169609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9935109 (or 9935075 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 63.

The spelling of 85928169609 in words is "eighty-five billion, nine hundred twenty-eight million, one hundred sixty-nine thousand, six hundred nine".