27865133688 has 32 divisors (see below), whose sum is σ = 79614668160. Its totient is φ = 7961466720.

The previous prime is 27865133629. The next prime is 27865133717. The reversal of 27865133688 is 88633156872.

It is a super-2 number, since 2×27865133688² (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 in 7 ways as a sum of consecutive naturals, for example, 82931778 + ... + 82932113.

It is an arithmetic number, because the mean of its divisors is an integer number (2487958380).

Almost surely, 2^27865133688 is an apocalyptic number.

27865133688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27865133688 is an abundant number, since it is smaller than the sum of its proper divisors (51749534472).

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

27865133688 is a wasteful number, since it uses less digits than its factorization.

27865133688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165863907 (or 165863903 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 57.

The spelling of 27865133688 in words is "twenty-seven billion, eight hundred sixty-five million, one hundred thirty-three thousand, six hundred eighty-eight".