161829085 has 16 divisors (see below), whose sum is σ = 212501952. Its totient is φ = 117331200.

The previous prime is 161829071. The next prime is 161829089. The reversal of 161829085 is 580928161.

161829085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161829085 - 2¹⁷ = 161698013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161829089) 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, 14170 + ... + 22900.

It is an arithmetic number, because the mean of its divisors is an integer number (13281372).

Almost surely, 2^161829085 is an apocalyptic number.

It is an amenable number.

161829085 is a deficient number, since it is larger than the sum of its proper divisors (50672867).

161829085 is a wasteful number, since it uses less digits than its factorization.

161829085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9084.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 161829085 is about 12721.2061142016. The cubic root of 161829085 is about 544.9443985585.

Subtracting from 161829085 its sum of digits (40), we obtain a triangular number (161829045 = T₁₇₉₉₀).

It can be divided in two parts, 1618 and 29085, that added together give a palindrome (30703).

The spelling of 161829085 in words is "one hundred sixty-one million, eight hundred twenty-nine thousand, eighty-five".