27664784368 has 20 divisors (see below), whose sum is σ = 57723637048. Its totient is φ = 12768361920.

The previous prime is 27664784333. The next prime is 27664784387. The reversal of 27664784368 is 86348746672.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 66501678 + ... + 66502093.

Almost surely, 2^27664784368 is an apocalyptic number.

It is an amenable number.

27664784368 is an abundant number, since it is smaller than the sum of its proper divisors (30058852680).

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

27664784368 is a wasteful number, since it uses less digits than its factorization.

27664784368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133003792 (or 133003786 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 61.

The spelling of 27664784368 in words is "twenty-seven billion, six hundred sixty-four million, seven hundred eighty-four thousand, three hundred sixty-eight".