27688045338671 has 2 divisors, whose sum is σ = 27688045338672. Its totient is φ = 27688045338670.

The previous prime is 27688045338649. The next prime is 27688045338721. The reversal of 27688045338671 is 17683354088672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27688045338671 - 2⁴² = 23289998827567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27688045338601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13844022669335 + 13844022669336.

It is an arithmetic number, because the mean of its divisors is an integer number (13844022669336).

Almost surely, 2^{27688045338671} is an apocalyptic number.

27688045338671 is a deficient number, since it is larger than the sum of its proper divisors (1).

27688045338671 is an equidigital number, since it uses as much as digits as its factorization.

27688045338671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 325140480, while the sum is 68.

The spelling of 27688045338671 in words is "twenty-seven trillion, six hundred eighty-eight billion, forty-five million, three hundred thirty-eight thousand, six hundred seventy-one".