161043604 has 12 divisors (see below), whose sum is σ = 282746464. Its totient is φ = 80258904.

The previous prime is 161043577. The next prime is 161043661. The reversal of 161043604 is 406340161.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64344 + ... + 66799.

Almost surely, 2^161043604 is an apocalyptic number.

It is an amenable number.

161043604 is a deficient number, since it is larger than the sum of its proper divisors (121702860).

161043604 is a wasteful number, since it uses less digits than its factorization.

161043604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131454 (or 131452 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 161043604 is about 12690.2956624343. The cubic root of 161043604 is about 544.0612901316.

Adding to 161043604 its reverse (406340161), we get a palindrome (567383765).

The spelling of 161043604 in words is "one hundred sixty-one million, forty-three thousand, six hundred four".