161932916 has 12 divisors (see below), whose sum is σ = 284078340. Its totient is φ = 80767680.

The previous prime is 161932913. The next prime is 161932921. The reversal of 161932916 is 619239161.

It can be written as a sum of positive squares in 2 ways, for example, as 78393316 + 83539600 = 8854^2 + 9140^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161932916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161932913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47855 + ... + 51126.

It is an arithmetic number, because the mean of its divisors is an integer number (23673195).

Almost surely, 2^161932916 is an apocalyptic number.

It is an amenable number.

161932916 is a deficient number, since it is larger than the sum of its proper divisors (122145424).

161932916 is a wasteful number, since it uses less digits than its factorization.

161932916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99394 (or 99392 counting only the distinct ones).

The product of its digits is 17496, while the sum is 38.

The square root of 161932916 is about 12725.2864800758. The cubic root of 161932916 is about 545.0609207213.

The spelling of 161932916 in words is "one hundred sixty-one million, nine hundred thirty-two thousand, nine hundred sixteen".