161049185 has 36 divisors (see below), whose sum is σ = 220291092. Its totient is φ = 112939200.

The previous prime is 161049181. The next prime is 161049193. The reversal of 161049185 is 581940161.

It can be written as a sum of positive squares in 2 ways, for example, as 41977441 + 119071744 = 6479^2 + 10912^2 .

It is not a de Polignac number, because 161049185 - 2² = 161049181 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161049181) 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 35 ways as a sum of consecutive naturals, for example, 581267 + ... + 581543.

It is an arithmetic number, because the mean of its divisors is an integer number (6119197).

Almost surely, 2^161049185 is an apocalyptic number.

It is an amenable number.

161049185 is a deficient number, since it is larger than the sum of its proper divisors (59241907).

161049185 is a wasteful number, since it uses less digits than its factorization.

161049185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 324 counting only the distinct ones).

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

The square root of 161049185 is about 12690.5155529632. The cubic root of 161049185 is about 544.0675749119.

The spelling of 161049185 in words is "one hundred sixty-one million, forty-nine thousand, one hundred eighty-five".