27800241181 has 2 divisors, whose sum is σ = 27800241182. Its totient is φ = 27800241180.

The previous prime is 27800241137. The next prime is 27800241187. The reversal of 27800241181 is 18114200872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26925856281 + 874384900 = 164091^2 + 29570^2 .

It is a cyclic number.

It is not a de Polignac number, because 27800241181 - 2²¹ = 27798144029 is a prime.

It is a super-2 number, since 2×27800241181² (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 (27800241187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13900120590 + 13900120591.

It is an arithmetic number, because the mean of its divisors is an integer number (13900120591).

Almost surely, 2^27800241181 is an apocalyptic number.

It is an amenable number.

27800241181 is a deficient number, since it is larger than the sum of its proper divisors (1).

27800241181 is an equidigital number, since it uses as much as digits as its factorization.

27800241181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 34.

The spelling of 27800241181 in words is "twenty-seven billion, eight hundred million, two hundred forty-one thousand, one hundred eighty-one".