161189108 has 6 divisors (see below), whose sum is σ = 282080946. Its totient is φ = 80594552.

The previous prime is 161189107. The next prime is 161189113. The reversal of 161189108 is 801981161.

It can be written as a sum of positive squares in only one way, i.e., 114019684 + 47169424 = 10678^2 + 6868^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161189101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20148635 + ... + 20148642.

It is an arithmetic number, because the mean of its divisors is an integer number (47013491).

Almost surely, 2^161189108 is an apocalyptic number.

It is an amenable number.

161189108 is a deficient number, since it is larger than the sum of its proper divisors (120891838).

161189108 is a wasteful number, since it uses less digits than its factorization.

161189108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40297281 (or 40297279 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 35.

The square root of 161189108 is about 12696.0272526488. The cubic root of 161189108 is about 544.2250951768.

The spelling of 161189108 in words is "one hundred sixty-one million, one hundred eighty-nine thousand, one hundred eight".