161499180 has 48 divisors (see below), whose sum is σ = 456876000. Its totient is φ = 42620928.

The previous prime is 161499179. The next prime is 161499193. The reversal of 161499180 is 81994161.

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, 8055 + ... + 19694.

It is an arithmetic number, because the mean of its divisors is an integer number (9518250).

Almost surely, 2^161499180 is an apocalyptic number.

161499180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161499180 is an abundant number, since it is smaller than the sum of its proper divisors (295376820).

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

161499180 is a wasteful number, since it uses less digits than its factorization.

161499180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27858 (or 27856 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 161499180 is about 12708.2327646294. The cubic root of 161499180 is about 544.5738384975.

The spelling of 161499180 in words is "one hundred sixty-one million, four hundred ninety-nine thousand, one hundred eighty".