27717375797 has 2 divisors, whose sum is σ = 27717375798. Its totient is φ = 27717375796.

The previous prime is 27717375689. The next prime is 27717375799. The reversal of 27717375797 is 79757371772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16034143876 + 11683231921 = 126626^2 + 108089^2 .

It is a cyclic number.

It is not a de Polignac number, because 27717375797 - 2²² = 27713181493 is a prime.

Together with 27717375799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27717375799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13858687898 + 13858687899.

It is an arithmetic number, because the mean of its divisors is an integer number (13858687899).

Almost surely, 2^27717375797 is an apocalyptic number.

It is an amenable number.

27717375797 is a deficient number, since it is larger than the sum of its proper divisors (1).

27717375797 is an equidigital number, since it uses as much as digits as its factorization.

27717375797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31765230, while the sum is 62.

The spelling of 27717375797 in words is "twenty-seven billion, seven hundred seventeen million, three hundred seventy-five thousand, seven hundred ninety-seven".