27444680689 has 2 divisors, whose sum is σ = 27444680690. Its totient is φ = 27444680688.

The previous prime is 27444680687. The next prime is 27444680713. The reversal of 27444680689 is 98608644472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14473293025 + 12971387664 = 120305^2 + 113892^2 .

It is a cyclic number.

It is not a de Polignac number, because 27444680689 - 2¹ = 27444680687 is a prime.

Together with 27444680687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27444680687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13722340344 + 13722340345.

It is an arithmetic number, because the mean of its divisors is an integer number (13722340345).

Almost surely, 2^27444680689 is an apocalyptic number.

It is an amenable number.

27444680689 is a deficient number, since it is larger than the sum of its proper divisors (1).

27444680689 is an equidigital number, since it uses as much as digits as its factorization.

27444680689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18579456, while the sum is 58.

The spelling of 27444680689 in words is "twenty-seven billion, four hundred forty-four million, six hundred eighty thousand, six hundred eighty-nine".