85816165 has 8 divisors (see below), whose sum is σ = 103999608. Its totient is φ = 67972800.

The previous prime is 85816127. The next prime is 85816177. The reversal of 85816165 is 56161858.

It can be written as a sum of positive squares in 4 ways, for example, as 31911201 + 53904964 = 5649^2 + 7342^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85816165 - 2²⁵ = 52261733 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84462 + ... + 85471.

It is an arithmetic number, because the mean of its divisors is an integer number (12999951).

Almost surely, 2^85816165 is an apocalyptic number.

It is an amenable number.

85816165 is a deficient number, since it is larger than the sum of its proper divisors (18183443).

85816165 is a wasteful number, since it uses less digits than its factorization.

85816165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170039.

The product of its digits is 57600, while the sum is 40.

The square root of 85816165 is about 9263.7014740329. The cubic root of 85816165 is about 441.0857569115.

The spelling of 85816165 in words is "eighty-five million, eight hundred sixteen thousand, one hundred sixty-five".