182161685 has 8 divisors (see below), whose sum is σ = 218928696. Its totient is φ = 145506240.

The previous prime is 182161669. The next prime is 182161687. The reversal of 182161685 is 586161281.

182161685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 92025649 + 90136036 = 9593^2 + 9494^2 .

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

It is not a de Polignac number, because 182161685 - 2⁴ = 182161669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (182161687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24254 + ... + 30863.

It is an arithmetic number, because the mean of its divisors is an integer number (27366087).

Almost surely, 2^182161685 is an apocalyptic number.

It is an amenable number.

182161685 is a deficient number, since it is larger than the sum of its proper divisors (36767011).

182161685 is an equidigital number, since it uses as much as digits as its factorization.

182161685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55783.

The product of its digits is 23040, while the sum is 38.

The square root of 182161685 is about 13496.7286777204. The cubic root of 182161685 is about 566.8728774688.

The spelling of 182161685 in words is "one hundred eighty-two million, one hundred sixty-one thousand, six hundred eighty-five".