161873185 has 8 divisors (see below), whose sum is σ = 194420736. Its totient is φ = 129383280.

The previous prime is 161873147. The next prime is 161873189. The reversal of 161873185 is 581378161.

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

It is not a de Polignac number, because 161873185 - 2⁹ = 161872673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161873189) 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, 7969 + ... + 19678.

It is an arithmetic number, because the mean of its divisors is an integer number (24302592).

Almost surely, 2^161873185 is an apocalyptic number.

It is an amenable number.

161873185 is a deficient number, since it is larger than the sum of its proper divisors (32547551).

161873185 is a wasteful number, since it uses less digits than its factorization.

161873185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28823.

The product of its digits is 40320, while the sum is 40.

The square root of 161873185 is about 12722.9393223421. The cubic root of 161873185 is about 544.9938949461.

The spelling of 161873185 in words is "one hundred sixty-one million, eight hundred seventy-three thousand, one hundred eighty-five".