161104320 has 252 divisors, whose sum is σ = 601848936. Its totient is φ = 39536640.

The previous prime is 161104301. The next prime is 161104373. The reversal of 161104320 is 23401161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 161104293 and 161104302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 486555 + ... + 486885.

Almost surely, 2^161104320 is an apocalyptic number.

161104320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161104320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300924468).

161104320 is an abundant number, since it is smaller than the sum of its proper divisors (440744616).

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

161104320 is a wasteful number, since it uses less digits than its factorization.

161104320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 161104320 is about 12692.6876586482. The cubic root of 161104320 is about 544.1296547939.

Adding to 161104320 its reverse (23401161), we get a palindrome (184505481).

The spelling of 161104320 in words is "one hundred sixty-one million, one hundred four thousand, three hundred twenty".