161404104 has 64 divisors (see below), whose sum is σ = 418337280. Its totient is φ = 51840000.

The previous prime is 161404099. The next prime is 161404123. The reversal of 161404104 is 401404161.

161404104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298074 + ... + 298614.

It is an arithmetic number, because the mean of its divisors is an integer number (6536520).

Almost surely, 2^161404104 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 161404104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209168640).

161404104 is an abundant number, since it is smaller than the sum of its proper divisors (256933176).

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

161404104 is a wasteful number, since it uses less digits than its factorization.

161404104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 161404104 is about 12704.4914892332. The cubic root of 161404104 is about 544.4669523698.

Adding to 161404104 its reverse (401404161), we get a palindrome (562808265).

The spelling of 161404104 in words is "one hundred sixty-one million, four hundred four thousand, one hundred four".