581611161 has 16 divisors (see below), whose sum is σ = 781516800. Its totient is φ = 384735120.

The previous prime is 581611159. The next prime is 581611171. The reversal of 581611161 is 161116185.

581611161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 581611161 - 2¹ = 581611159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (581611111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241240 + ... + 243638.

It is an arithmetic number, because the mean of its divisors is an integer number (48844800).

Almost surely, 2^581611161 is an apocalyptic number.

It is an amenable number.

581611161 is a deficient number, since it is larger than the sum of its proper divisors (199905639).

581611161 is a wasteful number, since it uses less digits than its factorization.

581611161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996.

The product of its digits is 1440, while the sum is 30.

The square root of 581611161 is about 24116.6158695618. The cubic root of 581611161 is about 834.7265821666.

The spelling of 581611161 in words is "five hundred eighty-one million, six hundred eleven thousand, one hundred sixty-one".