161136916 has 12 divisors (see below), whose sum is σ = 282097620. Its totient is φ = 80537600.

The previous prime is 161136893. The next prime is 161136917. The reversal of 161136916 is 619631161.

It can be written as a sum of positive squares in 2 ways, for example, as 129732100 + 31404816 = 11390^2 + 5604^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161136917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7266 + ... + 19366.

It is an arithmetic number, because the mean of its divisors is an integer number (23508135).

Almost surely, 2^161136916 is an apocalyptic number.

It is an amenable number.

161136916 is a deficient number, since it is larger than the sum of its proper divisors (120960704).

161136916 is a wasteful number, since it uses less digits than its factorization.

161136916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15434 (or 15432 counting only the distinct ones).

The product of its digits is 5832, while the sum is 34.

The square root of 161136916 is about 12693.9716401133. The cubic root of 161136916 is about 544.1663499700.

The spelling of 161136916 in words is "one hundred sixty-one million, one hundred thirty-six thousand, nine hundred sixteen".