181630116 has 36 divisors (see below), whose sum is σ = 473933824. Its totient is φ = 58590000.

The previous prime is 181630109. The next prime is 181630117. The reversal of 181630116 is 611036181.

181630116 is a `hidden beast` number, since 18 + 1 + 630 + 1 + 16 = 666.

181630116 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 181630116.

It is not an unprimeable number, because it can be changed into a prime (181630117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80260 + ... + 82491.

Almost surely, 2^181630116 is an apocalyptic number.

It is an amenable number.

181630116 is an abundant number, since it is smaller than the sum of its proper divisors (292303708).

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

181630116 is a wasteful number, since it uses less digits than its factorization.

181630116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162792 (or 162787 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 181630116 is about 13477.0217778261. The cubic root of 181630116 is about 566.3209399011.

Adding to 181630116 its reverse (611036181), we get a palindrome (792666297).

The spelling of 181630116 in words is "one hundred eighty-one million, six hundred thirty thousand, one hundred sixteen".