181120716 has 144 divisors (see below), whose sum is σ = 543449088. Its totient is φ = 49795200.

The previous prime is 181120679. The next prime is 181120721. The reversal of 181120716 is 617021181.

It is a self number, because there is not a number n which added to its sum of digits gives 181120716.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 948181 + ... + 948371.

It is an arithmetic number, because the mean of its divisors is an integer number (3773952).

Almost surely, 2^181120716 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 181120716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271724544).

181120716 is an abundant number, since it is smaller than the sum of its proper divisors (362328372).

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

181120716 is a wasteful number, since it uses less digits than its factorization.

181120716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

The square root of 181120716 is about 13458.1096740961. The cubic root of 181120716 is about 565.7910094244.

Adding to 181120716 its reverse (617021181), we get a palindrome (798141897).

The spelling of 181120716 in words is "one hundred eighty-one million, one hundred twenty thousand, seven hundred sixteen".