27773516564 has 12 divisors (see below), whose sum is σ = 48609088500. Its totient is φ = 13885205568.

The previous prime is 27773516527. The next prime is 27773516569. The reversal of 27773516564 is 46561537772.

It can be written as a sum of positive squares in 2 ways, for example, as 18321788164 + 9451728400 = 135358^2 + 97220^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27773516569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347459 + ... + 419850.

It is an arithmetic number, because the mean of its divisors is an integer number (4050757375).

Almost surely, 2^27773516564 is an apocalyptic number.

It is an amenable number.

27773516564 is a deficient number, since it is larger than the sum of its proper divisors (20835571936).

27773516564 is a wasteful number, since it uses less digits than its factorization.

27773516564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776362 (or 776360 counting only the distinct ones).

The product of its digits is 7408800, while the sum is 53.

The spelling of 27773516564 in words is "twenty-seven billion, seven hundred seventy-three million, five hundred sixteen thousand, five hundred sixty-four".