27663870564 has 72 divisors (see below), whose sum is σ = 76332127872. Its totient is φ = 8377836480.

The previous prime is 27663870557. The next prime is 27663870599. The reversal of 27663870564 is 46507836672.

27663870564 is a `hidden beast` number, since 2 + 7 + 6 + 6 + 3 + 8 + 70 + 564 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 27663870564.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 649797 + ... + 691059.

Almost surely, 2^27663870564 is an apocalyptic number.

It is an amenable number.

27663870564 is an abundant number, since it is smaller than the sum of its proper divisors (48668257308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27663870564 is a wasteful number, since it uses less digits than its factorization.

27663870564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42977 (or 42972 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 27663870564 in words is "twenty-seven billion, six hundred sixty-three million, eight hundred seventy thousand, five hundred sixty-four".