181366122116 has 12 divisors (see below), whose sum is σ = 317513799120. Its totient is φ = 90647893800.

The previous prime is 181366122107. The next prime is 181366122143. The reversal of 181366122116 is 611221663181.

It is a self number, because there is not a number n which added to its sum of digits gives 181366122116.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8780210 + ... + 8800841.

It is an arithmetic number, because the mean of its divisors is an integer number (26459483260).

Almost surely, 2^181366122116 is an apocalyptic number.

It is an amenable number.

181366122116 is a deficient number, since it is larger than the sum of its proper divisors (136147677004).

181366122116 is a wasteful number, since it uses less digits than its factorization.

181366122116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17583634 (or 17583632 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

Adding to 181366122116 its reverse (611221663181), we get a palindrome (792587785297).

The spelling of 181366122116 in words is "one hundred eighty-one billion, three hundred sixty-six million, one hundred twenty-two thousand, one hundred sixteen".