161118330 has 32 divisors (see below), whose sum is σ = 388701504. Its totient is φ = 42740736.

The previous prime is 161118329. The next prime is 161118337. The reversal of 161118330 is 33811161.

161118330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161118330.

It is not an unprimeable number, because it can be changed into a prime (161118337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8124 + ... + 19703.

It is an arithmetic number, because the mean of its divisors is an integer number (12146922).

Almost surely, 2^161118330 is an apocalyptic number.

161118330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161118330 is an abundant number, since it is smaller than the sum of its proper divisors (227583174).

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

161118330 is a wasteful number, since it uses less digits than its factorization.

161118330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28030.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 161118330 is about 12693.2395392193. The cubic root of 161118330 is about 544.1454272564.

Adding to 161118330 its reverse (33811161), we get a palindrome (194929491).

The spelling of 161118330 in words is "one hundred sixty-one million, one hundred eighteen thousand, three hundred thirty".