27788842357 has 2 divisors, whose sum is σ = 27788842358. Its totient is φ = 27788842356.

The previous prime is 27788842343. The next prime is 27788842381. The reversal of 27788842357 is 75324888772.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19967385636 + 7821456721 = 141306^2 + 88439^2 .

It is a cyclic number.

It is not a de Polignac number, because 27788842357 - 2²⁷ = 27654624629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27788842295 and 27788842304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27788842387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13894421178 + 13894421179.

It is an arithmetic number, because the mean of its divisors is an integer number (13894421179).

Almost surely, 2^27788842357 is an apocalyptic number.

It is an amenable number.

27788842357 is a deficient number, since it is larger than the sum of its proper divisors (1).

27788842357 is an equidigital number, since it uses as much as digits as its factorization.

27788842357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42147840, while the sum is 61.

The spelling of 27788842357 in words is "twenty-seven billion, seven hundred eighty-eight million, eight hundred forty-two thousand, three hundred fifty-seven".