80731060181 has 6 divisors (see below), whose sum is σ = 85759292610. Its totient is φ = 75982174016.

The previous prime is 80731060177. The next prime is 80731060237. The reversal of 80731060181 is 18106013708.

It can be written as a sum of positive squares in 3 ways, for example, as 11250844900 + 69480215281 = 106070^2 + 263591^2 .

It is not a de Polignac number, because 80731060181 - 2² = 80731060177 is a prime.

It is a super-2 number, since 2×80731060181² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80731060141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139672826 + ... + 139673403.

It is an arithmetic number, because the mean of its divisors is an integer number (14293215435).

Almost surely, 2^80731060181 is an apocalyptic number.

It is an amenable number.

80731060181 is a deficient number, since it is larger than the sum of its proper divisors (5028232429).

80731060181 is a wasteful number, since it uses less digits than its factorization.

80731060181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279346263 (or 279346246 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

Adding to 80731060181 its reverse (18106013708), we get a palindrome (98837073889).

The spelling of 80731060181 in words is "eighty billion, seven hundred thirty-one million, sixty thousand, one hundred eighty-one".