181141816 has 8 divisors (see below), whose sum is σ = 339640920. Its totient is φ = 90570904.

The previous prime is 181141799. The next prime is 181141823. The reversal of 181141816 is 618141181.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11321356 + ... + 11321371.

It is an arithmetic number, because the mean of its divisors is an integer number (42455115).

Almost surely, 2^181141816 is an apocalyptic number.

It is an amenable number.

181141816 is a deficient number, since it is larger than the sum of its proper divisors (158499104).

181141816 is a wasteful number, since it uses less digits than its factorization.

181141816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22642733 (or 22642729 counting only the distinct ones).

The product of its digits is 1536, while the sum is 31.

The square root of 181141816 is about 13458.8935652230. The cubic root of 181141816 is about 565.8129795355.

Adding to 181141816 its reverse (618141181), we get a palindrome (799282997).

The spelling of 181141816 in words is "one hundred eighty-one million, one hundred forty-one thousand, eight hundred sixteen".