181172946116 has 12 divisors (see below), whose sum is σ = 317851279788. Its totient is φ = 90358294752.

The previous prime is 181172946109. The next prime is 181172946127. The reversal of 181172946116 is 611649271181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 46960623616 + 134212322500 = 216704^2 + 366350^2 .

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, 57042791 + ... + 57045966.

It is an arithmetic number, because the mean of its divisors is an integer number (26487606649).

Almost surely, 2^181172946116 is an apocalyptic number.

It is an amenable number.

181172946116 is a deficient number, since it is larger than the sum of its proper divisors (136678333672).

181172946116 is a wasteful number, since it uses less digits than its factorization.

181172946116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114089158 (or 114089156 counting only the distinct ones).

The product of its digits is 145152, while the sum is 47.

The spelling of 181172946116 in words is "one hundred eighty-one billion, one hundred seventy-two million, nine hundred forty-six thousand, one hundred sixteen".