27071537081 has 2 divisors, whose sum is σ = 27071537082. Its totient is φ = 27071537080.

The previous prime is 27071537057. The next prime is 27071537083. The reversal of 27071537081 is 18073517072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26934061456 + 137475625 = 164116^2 + 11725^2 .

It is a cyclic number.

It is not a de Polignac number, because 27071537081 - 2²² = 27067342777 is a prime.

It is a super-2 number, since 2×27071537081² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 27071537083, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27071537083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13535768540 + 13535768541.

It is an arithmetic number, because the mean of its divisors is an integer number (13535768541).

Almost surely, 2^27071537081 is an apocalyptic number.

It is an amenable number.

27071537081 is a deficient number, since it is larger than the sum of its proper divisors (1).

27071537081 is an equidigital number, since it uses as much as digits as its factorization.

27071537081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82320, while the sum is 41.

The spelling of 27071537081 in words is "twenty-seven billion, seventy-one million, five hundred thirty-seven thousand, eighty-one".