27788617820567 has 2 divisors, whose sum is σ = 27788617820568. Its totient is φ = 27788617820566.

The previous prime is 27788617820531. The next prime is 27788617820599. The reversal of 27788617820567 is 76502871688772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27788617820567 - 2³⁰ = 27787544078743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27788617820494 and 27788617820503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27788617820267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13894308910283 + 13894308910284.

It is an arithmetic number, because the mean of its divisors is an integer number (13894308910284).

Almost surely, 2^{27788617820567} is an apocalyptic number.

27788617820567 is a deficient number, since it is larger than the sum of its proper divisors (1).

27788617820567 is an equidigital number, since it uses as much as digits as its factorization.

27788617820567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 885104640, while the sum is 74.

The spelling of 27788617820567 in words is "twenty-seven trillion, seven hundred eighty-eight billion, six hundred seventeen million, eight hundred twenty thousand, five hundred sixty-seven".