27665128916 has 12 divisors (see below), whose sum is σ = 50518931232. Its totient is φ = 13231148568.

The previous prime is 27665128889. The next prime is 27665128921. The reversal of 27665128916 is 61982156672.

It is a super-3 number, since 3×27665128916³ (a number of 32 digits) contains 333 as substring.

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, 150353870 + ... + 150354053.

It is an arithmetic number, because the mean of its divisors is an integer number (4209910936).

Almost surely, 2^27665128916 is an apocalyptic number.

It is an amenable number.

27665128916 is a deficient number, since it is larger than the sum of its proper divisors (22853802316).

27665128916 is a wasteful number, since it uses less digits than its factorization.

27665128916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300707950 (or 300707948 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 53.

The spelling of 27665128916 in words is "twenty-seven billion, six hundred sixty-five million, one hundred twenty-eight thousand, nine hundred sixteen".