27108197771 has 2 divisors, whose sum is σ = 27108197772. Its totient is φ = 27108197770.

The previous prime is 27108197747. The next prime is 27108197791. The reversal of 27108197771 is 17779180172.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27108197771 - 2⁶ = 27108197707 is a prime.

It is not a weakly prime, because it can be changed into another prime (27108197791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13554098885 + 13554098886.

It is an arithmetic number, because the mean of its divisors is an integer number (13554098886).

Almost surely, 2^27108197771 is an apocalyptic number.

27108197771 is a deficient number, since it is larger than the sum of its proper divisors (1).

27108197771 is an equidigital number, since it uses as much as digits as its factorization.

27108197771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345744, while the sum is 50.

The spelling of 27108197771 in words is "twenty-seven billion, one hundred eight million, one hundred ninety-seven thousand, seven hundred seventy-one".