161015166 has 48 divisors (see below), whose sum is σ = 382820256. Its totient is φ = 48604608.

The previous prime is 161015117. The next prime is 161015171. The reversal of 161015166 is 661510161.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5911 + ... + 18893.

It is an arithmetic number, because the mean of its divisors is an integer number (7975422).

Almost surely, 2^161015166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161015166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191410128).

161015166 is an abundant number, since it is smaller than the sum of its proper divisors (221805090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161015166 is a wasteful number, since it uses less digits than its factorization.

161015166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13057 (or 13054 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 161015166 is about 12689.1751504974. The cubic root of 161015166 is about 544.0292637624.

The spelling of 161015166 in words is "one hundred sixty-one million, fifteen thousand, one hundred sixty-six".