27665518868 has 48 divisors (see below), whose sum is σ = 52446730560. Its totient is φ = 12693542400.

The previous prime is 27665518831. The next prime is 27665518897. The reversal of 27665518868 is 86881556672.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 27665518868.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 6521228 + ... + 6525468.

It is an arithmetic number, because the mean of its divisors is an integer number (1092640220).

Almost surely, 2^27665518868 is an apocalyptic number.

It is an amenable number.

27665518868 is a deficient number, since it is larger than the sum of its proper divisors (24781211692).

27665518868 is a wasteful number, since it uses less digits than its factorization.

27665518868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4968 (or 4966 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 62.

The spelling of 27665518868 in words is "twenty-seven billion, six hundred sixty-five million, five hundred eighteen thousand, eight hundred sixty-eight".