161324784 has 70 divisors (see below), whose sum is σ = 468669656. Its totient is φ = 53771040.

The previous prime is 161324771. The next prime is 161324803. The reversal of 161324784 is 487423161.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 4749 + ... + 18579.

Almost surely, 2^161324784 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 161324784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234334828).

161324784 is an abundant number, since it is smaller than the sum of its proper divisors (307344872).

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

161324784 is an equidigital number, since it uses as much as digits as its factorization.

161324784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13857 (or 13836 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 161324784 is about 12701.3693749926. The cubic root of 161324784 is about 544.3777472957.

The spelling of 161324784 in words is "one hundred sixty-one million, three hundred twenty-four thousand, seven hundred eighty-four".