161814573 has 6 divisors (see below), whose sum is σ = 233732174. Its totient is φ = 107876376.

The previous prime is 161814563. The next prime is 161814593. The reversal of 161814573 is 375418161.

161814573 is a `hidden beast` number, since 1 + 6 + 1 + 81 + 4 + 573 = 666.

It can be written as a sum of positive squares in only one way, i.e., 84603204 + 77211369 = 9198^2 + 8787^2 .

It is not a de Polignac number, because 161814573 - 2¹⁰ = 161813549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161814503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8989690 + ... + 8989707.

Almost surely, 2^161814573 is an apocalyptic number.

It is an amenable number.

161814573 is a deficient number, since it is larger than the sum of its proper divisors (71917601).

161814573 is a wasteful number, since it uses less digits than its factorization.

161814573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17979403 (or 17979400 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 161814573 is about 12720.6357152463. The cubic root of 161814573 is about 544.9281088013.

The spelling of 161814573 in words is "one hundred sixty-one million, eight hundred fourteen thousand, five hundred seventy-three".