27694564669 has 2 divisors, whose sum is σ = 27694564670. Its totient is φ = 27694564668.

The previous prime is 27694564613. The next prime is 27694564691. The reversal of 27694564669 is 96646549672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22249600569 + 5444964100 = 149163^2 + 73790^2 .

It is a cyclic number.

It is not a de Polignac number, because 27694564669 - 2¹⁵ = 27694531901 is a prime.

It is a super-2 number, since 2×27694564669² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27694564669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27694574669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13847282334 + 13847282335.

It is an arithmetic number, because the mean of its divisors is an integer number (13847282335).

Almost surely, 2^27694564669 is an apocalyptic number.

It is an amenable number.

27694564669 is a deficient number, since it is larger than the sum of its proper divisors (1).

27694564669 is an equidigital number, since it uses as much as digits as its factorization.

27694564669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117573120, while the sum is 64.

The spelling of 27694564669 in words is "twenty-seven billion, six hundred ninety-four million, five hundred sixty-four thousand, six hundred sixty-nine".