161804608 has 56 divisors (see below), whose sum is σ = 386283200. Its totient is φ = 65691648.

The previous prime is 161804507. The next prime is 161804611. The reversal of 161804608 is 806408161.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 993 + ... + 18016.

Almost surely, 2^161804608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161804608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193141600).

161804608 is an abundant number, since it is smaller than the sum of its proper divisors (224478592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161804608 is a wasteful number, since it uses less digits than its factorization.

161804608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19047 (or 19037 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 161804608 is about 12720.2440228165. The cubic root of 161804608 is about 544.9169224992.

The spelling of 161804608 in words is "one hundred sixty-one million, eight hundred four thousand, six hundred eight".