27723883181 has 2 divisors, whose sum is σ = 27723883182. Its totient is φ = 27723883180.

The previous prime is 27723883153. The next prime is 27723883241. The reversal of 27723883181 is 18138832772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27703938025 + 19945156 = 166445^2 + 4466^2 .

It is a cyclic number.

It is not a de Polignac number, because 27723883181 - 2¹⁰ = 27723882157 is a prime.

It is a super-2 number, since 2×27723883181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27723880181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13861941590 + 13861941591.

It is an arithmetic number, because the mean of its divisors is an integer number (13861941591).

Almost surely, 2^27723883181 is an apocalyptic number.

It is an amenable number.

27723883181 is a deficient number, since it is larger than the sum of its proper divisors (1).

27723883181 is an equidigital number, since it uses as much as digits as its factorization.

27723883181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 50.

The spelling of 27723883181 in words is "twenty-seven billion, seven hundred twenty-three million, eight hundred eighty-three thousand, one hundred eighty-one".