27564403868 has 6 divisors (see below), whose sum is σ = 48237706776. Its totient is φ = 13782201932.

The previous prime is 27564403859. The next prime is 27564403873. The reversal of 27564403868 is 86830446572.

It is a happy number.

It is a super-2 number, since 2×27564403868² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3445550480 + ... + 3445550487.

It is an arithmetic number, because the mean of its divisors is an integer number (8039617796).

Almost surely, 2^27564403868 is an apocalyptic number.

It is an amenable number.

27564403868 is a deficient number, since it is larger than the sum of its proper divisors (20673302908).

27564403868 is a wasteful number, since it uses less digits than its factorization.

27564403868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6891100971 (or 6891100969 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 53.

The spelling of 27564403868 in words is "twenty-seven billion, five hundred sixty-four million, four hundred three thousand, eight hundred sixty-eight".