27547216769 has 2 divisors, whose sum is σ = 27547216770. Its totient is φ = 27547216768.

The previous prime is 27547216759. The next prime is 27547216787. The reversal of 27547216769 is 96761274572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16837657600 + 10709559169 = 129760^2 + 103487^2 .

It is a cyclic number.

It is not a de Polignac number, because 27547216769 - 2¹² = 27547212673 is a prime.

It is a super-2 number, since 2×27547216769² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27547216759) 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, 13773608384 + 13773608385.

It is an arithmetic number, because the mean of its divisors is an integer number (13773608385).

Almost surely, 2^27547216769 is an apocalyptic number.

It is an amenable number.

27547216769 is a deficient number, since it is larger than the sum of its proper divisors (1).

27547216769 is an equidigital number, since it uses as much as digits as its factorization.

27547216769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8890560, while the sum is 56.

The spelling of 27547216769 in words is "twenty-seven billion, five hundred forty-seven million, two hundred sixteen thousand, seven hundred sixty-nine".