161078180 has 48 divisors (see below), whose sum is σ = 352235520. Its totient is φ = 61799808.

The previous prime is 161078173. The next prime is 161078191. The reversal of 161078180 is 81870161.

161078180 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161078180² = 51892360144224800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96029 + ... + 97691.

It is an arithmetic number, because the mean of its divisors is an integer number (7338240).

Almost surely, 2^161078180 is an apocalyptic number.

161078180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161078180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176117760).

161078180 is an abundant number, since it is smaller than the sum of its proper divisors (191157340).

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

161078180 is a wasteful number, since it uses less digits than its factorization.

161078180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868 (or 1866 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 161078180 is about 12691.6578901261. The cubic root of 161078180 is about 544.1002239288.

The spelling of 161078180 in words is "one hundred sixty-one million, seventy-eight thousand, one hundred eighty".