161120784 has 80 divisors (see below), whose sum is σ = 456667200. Its totient is φ = 48545280.

The previous prime is 161120777. The next prime is 161120801. The reversal of 161120784 is 487021161.

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, 103242 + ... + 104790.

It is an arithmetic number, because the mean of its divisors is an integer number (5708340).

Almost surely, 2^161120784 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 161120784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228333600).

161120784 is an abundant number, since it is smaller than the sum of its proper divisors (295546416).

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

161120784 is a wasteful number, since it uses less digits than its factorization.

161120784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768 (or 1762 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 161120784 is about 12693.3362044815. The cubic root of 161120784 is about 544.1481898762.

The spelling of 161120784 in words is "one hundred sixty-one million, one hundred twenty thousand, seven hundred eighty-four".