27756336689 has 2 divisors, whose sum is σ = 27756336690. Its totient is φ = 27756336688.

The previous prime is 27756336683. The next prime is 27756336701. The reversal of 27756336689 is 98663365772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16139161600 + 11617175089 = 127040^2 + 107783^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27756336689 is a prime.

It is not a weakly prime, because it can be changed into another prime (27756336683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13878168344 + 13878168345.

It is an arithmetic number, because the mean of its divisors is an integer number (13878168345).

Almost surely, 2^27756336689 is an apocalyptic number.

It is an amenable number.

27756336689 is a deficient number, since it is larger than the sum of its proper divisors (1).

27756336689 is an equidigital number, since it uses as much as digits as its factorization.

27756336689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68584320, while the sum is 62.

The spelling of 27756336689 in words is "twenty-seven billion, seven hundred fifty-six million, three hundred thirty-six thousand, six hundred eighty-nine".