27636863668 has 24 divisors (see below), whose sum is σ = 51091225920. Its totient is φ = 13044548160.

The previous prime is 27636863659. The next prime is 27636863669. The reversal of 27636863668 is 86636863672.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27636863669) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 625696 + ... + 668407.

It is an arithmetic number, because the mean of its divisors is an integer number (2128801080).

Almost surely, 2^27636863668 is an apocalyptic number.

It is an amenable number.

27636863668 is a deficient number, since it is larger than the sum of its proper divisors (23454362252).

27636863668 is a wasteful number, since it uses less digits than its factorization.

27636863668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294407 (or 1294405 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 61.

The spelling of 27636863668 in words is "twenty-seven billion, six hundred thirty-six million, eight hundred sixty-three thousand, six hundred sixty-eight".