161324800 has 216 divisors, whose sum is σ = 493225376. Its totient is φ = 50872320.

The previous prime is 161324771. The next prime is 161324803. The reversal of 161324800 is 8423161.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161324803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 582262 + ... + 582538.

Almost surely, 2^161324800 is an apocalyptic number.

161324800 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 161324800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246612688).

161324800 is an abundant number, since it is smaller than the sum of its proper divisors (331900576).

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

161324800 is a wasteful number, since it uses less digits than its factorization.

161324800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 161324800 is about 12701.3700048459. The cubic root of 161324800 is about 544.3777652926.

Adding to 161324800 its reverse (8423161), we get a palindrome (169747961).

The spelling of 161324800 in words is "one hundred sixty-one million, three hundred twenty-four thousand, eight hundred".