27862043689 has 2 divisors, whose sum is σ = 27862043690. Its totient is φ = 27862043688.

The previous prime is 27862043687. The next prime is 27862043701. The reversal of 27862043689 is 98634026872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22175677225 + 5686366464 = 148915^2 + 75408^2 .

It is a cyclic number.

It is not a de Polignac number, because 27862043689 - 2¹ = 27862043687 is a prime.

Together with 27862043687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27862043687) 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, 13931021844 + 13931021845.

It is an arithmetic number, because the mean of its divisors is an integer number (13931021845).

Almost surely, 2^27862043689 is an apocalyptic number.

It is an amenable number.

27862043689 is a deficient number, since it is larger than the sum of its proper divisors (1).

27862043689 is an equidigital number, since it uses as much as digits as its factorization.

27862043689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 27862043689 in words is "twenty-seven billion, eight hundred sixty-two million, forty-three thousand, six hundred eighty-nine".