27731813568 has 56 divisors (see below), whose sum is σ = 73635016560. Its totient is φ = 9211023360.

The previous prime is 27731813521. The next prime is 27731813591. The reversal of 27731813568 is 86531813772.

It is a self number, because there is not a number n which added to its sum of digits gives 27731813568.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203053 + ... + 310956.

It is an arithmetic number, because the mean of its divisors is an integer number (1314911010).

Almost surely, 2^27731813568 is an apocalyptic number.

It is an amenable number.

27731813568 is an abundant number, since it is smaller than the sum of its proper divisors (45903202992).

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

27731813568 is a wasteful number, since it uses less digits than its factorization.

27731813568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514305 (or 514295 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 51.

The spelling of 27731813568 in words is "twenty-seven billion, seven hundred thirty-one million, eight hundred thirteen thousand, five hundred sixty-eight".