27808966593 has 12 divisors (see below), whose sum is σ = 40178549268. Its totient is φ = 18534676320.

The previous prime is 27808966553. The next prime is 27808966631. The reversal of 27808966593 is 39566980872.

It can be written as a sum of positive squares in 2 ways, for example, as 9241361424 + 18567605169 = 96132^2 + 136263^2 .

It is not a de Polignac number, because 27808966593 - 2⁶ = 27808966529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27808966593.

It is not an unprimeable number, because it can be changed into a prime (27808966513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348030 + ... + 420407.

It is an arithmetic number, because the mean of its divisors is an integer number (3348212439).

Almost surely, 2^27808966593 is an apocalyptic number.

It is an amenable number.

27808966593 is a deficient number, since it is larger than the sum of its proper divisors (12369582675).

27808966593 is a wasteful number, since it uses less digits than its factorization.

27808966593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772464 (or 772461 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 27808966593 in words is "twenty-seven billion, eight hundred eight million, nine hundred sixty-six thousand, five hundred ninety-three".