163816085 has 4 divisors (see below), whose sum is σ = 196579308. Its totient is φ = 131052864.

The previous prime is 163816067. The next prime is 163816109. The reversal of 163816085 is 580618361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580618361 = 421 ⋅1379141.

It can be written as a sum of positive squares in 2 ways, for example, as 63856081 + 99960004 = 7991^2 + 9998^2 .

It is a cyclic number.

It is not a de Polignac number, because 163816085 - 2¹⁸ = 163553941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16381604 + ... + 16381613.

It is an arithmetic number, because the mean of its divisors is an integer number (49144827).

Almost surely, 2^163816085 is an apocalyptic number.

It is an amenable number.

163816085 is a deficient number, since it is larger than the sum of its proper divisors (32763223).

163816085 is an equidigital number, since it uses as much as digits as its factorization.

163816085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32763222.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 163816085 is about 12799.0657862205. The cubic root of 163816085 is about 547.1656778945.

The spelling of 163816085 in words is "one hundred sixty-three million, eight hundred sixteen thousand, eighty-five".