161850194 has 32 divisors (see below), whose sum is σ = 279797760. Its totient is φ = 69526800.

The previous prime is 161850193. The next prime is 161850229. The reversal of 161850194 is 491058161.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161850191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26567 + ... + 32085.

It is an arithmetic number, because the mean of its divisors is an integer number (8743680).

Almost surely, 2^161850194 is an apocalyptic number.

161850194 is a deficient number, since it is larger than the sum of its proper divisors (117947566).

161850194 is a wasteful number, since it uses less digits than its factorization.

161850194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5606.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 161850194 is about 12722.0357647666. The cubic root of 161850194 is about 544.9680917267.

The spelling of 161850194 in words is "one hundred sixty-one million, eight hundred fifty thousand, one hundred ninety-four".