27608080861 has 2 divisors, whose sum is σ = 27608080862. Its totient is φ = 27608080860.

The previous prime is 27608080859. The next prime is 27608080873. The reversal of 27608080861 is 16808080672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21924428761 + 5683652100 = 148069^2 + 75390^2 .

It is a cyclic number.

It is not a de Polignac number, because 27608080861 - 2¹ = 27608080859 is a prime.

It is a super-2 number, since 2×27608080861² (a number of 22 digits) contains 22 as substring.

Together with 27608080859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27608080811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13804040430 + 13804040431.

It is an arithmetic number, because the mean of its divisors is an integer number (13804040431).

Almost surely, 2^27608080861 is an apocalyptic number.

It is an amenable number.

27608080861 is a deficient number, since it is larger than the sum of its proper divisors (1).

27608080861 is an equidigital number, since it uses as much as digits as its factorization.

27608080861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 258048, while the sum is 46.

The spelling of 27608080861 in words is "twenty-seven billion, six hundred eight million, eighty thousand, eight hundred sixty-one".