161850785 has 8 divisors (see below), whose sum is σ = 194619456. Its totient is φ = 129214960.

The previous prime is 161850757. The next prime is 161850809. The reversal of 161850785 is 587058161.

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

It is not a de Polignac number, because 161850785 - 2⁸ = 161850529 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 30509 + ... + 35418.

It is an arithmetic number, because the mean of its divisors is an integer number (24327432).

Almost surely, 2^161850785 is an apocalyptic number.

It is an amenable number.

161850785 is a deficient number, since it is larger than the sum of its proper divisors (32768671).

161850785 is an equidigital number, since it uses as much as digits as its factorization.

161850785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66423.

The product of its (nonzero) digits is 67200, while the sum is 41.

The square root of 161850785 is about 12722.0589921600. The cubic root of 161850785 is about 544.9687550474.

The spelling of 161850785 in words is "one hundred sixty-one million, eight hundred fifty thousand, seven hundred eighty-five".