161779232 has 12 divisors (see below), whose sum is σ = 318502926. Its totient is φ = 80889600.

The previous prime is 161779231. The next prime is 161779249. The reversal of 161779232 is 232977161.

It can be written as a sum of positive squares in only one way, i.e., 103958416 + 57820816 = 10196^2 + 7604^2 .

It is not an unprimeable number, because it can be changed into a prime (161779231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2527769 + ... + 2527832.

Almost surely, 2^161779232 is an apocalyptic number.

It is an amenable number.

161779232 is a deficient number, since it is larger than the sum of its proper divisors (156723694).

161779232 is an equidigital number, since it uses as much as digits as its factorization.

161779232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5055611 (or 5055603 counting only the distinct ones).

The product of its digits is 31752, while the sum is 38.

The square root of 161779232 is about 12719.2465185639. The cubic root of 161779232 is about 544.8884343638. Note that the first 3 decimals are identical.

The spelling of 161779232 in words is "one hundred sixty-one million, seven hundred seventy-nine thousand, two hundred thirty-two".