27111966638 has 16 divisors (see below), whose sum is σ = 41551259904. Its totient is φ = 13261797240.

The previous prime is 27111966559. The next prime is 27111966659. The reversal of 27111966638 is 83666911172.

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, 159173 + ... + 282063.

It is an arithmetic number, because the mean of its divisors is an integer number (2596953744).

Almost surely, 2^27111966638 is an apocalyptic number.

27111966638 is a deficient number, since it is larger than the sum of its proper divisors (14439293266).

27111966638 is a wasteful number, since it uses less digits than its factorization.

27111966638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125287.

The product of its digits is 653184, while the sum is 50.

The spelling of 27111966638 in words is "twenty-seven billion, one hundred eleven million, nine hundred sixty-six thousand, six hundred thirty-eight".