27628978171 has 2 divisors, whose sum is σ = 27628978172. Its totient is φ = 27628978170.

The previous prime is 27628978151. The next prime is 27628978189. The reversal of 27628978171 is 17187982672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27628978171 - 2¹⁵ = 27628945403 is a prime.

It is not a weakly prime, because it can be changed into another prime (27628978151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13814489085 + 13814489086.

It is an arithmetic number, because the mean of its divisors is an integer number (13814489086).

Almost surely, 2^27628978171 is an apocalyptic number.

27628978171 is a deficient number, since it is larger than the sum of its proper divisors (1).

27628978171 is an equidigital number, since it uses as much as digits as its factorization.

27628978171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4741632, while the sum is 58.

The spelling of 27628978171 in words is "twenty-seven billion, six hundred twenty-eight million, nine hundred seventy-eight thousand, one hundred seventy-one".