180181801831 has 2 divisors, whose sum is σ = 180181801832. Its totient is φ = 180181801830.

The previous prime is 180181801783. The next prime is 180181801841. The reversal of 180181801831 is 138108181081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 180181801831 - 2¹⁵ = 180181769063 is a prime.

It is a super-2 number, since 2×180181801831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180181801841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90090900915 + 90090900916.

It is an arithmetic number, because the mean of its divisors is an integer number (90090900916).

Almost surely, 2^180181801831 is an apocalyptic number.

180181801831 is a deficient number, since it is larger than the sum of its proper divisors (1).

180181801831 is an equidigital number, since it uses as much as digits as its factorization.

180181801831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 40.

The spelling of 180181801831 in words is "one hundred eighty billion, one hundred eighty-one million, eight hundred one thousand, eight hundred thirty-one".