27823538664 has 64 divisors (see below), whose sum is σ = 77301230400. Its totient is φ = 9272878272.

The previous prime is 27823538641. The next prime is 27823538671. The reversal of 27823538664 is 46683532872.

27823538664 is a `hidden beast` number, since 27 + 8 + 23 + 538 + 6 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 27823538664.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2395479 + ... + 2407065.

It is an arithmetic number, because the mean of its divisors is an integer number (1207831725).

Almost surely, 2^27823538664 is an apocalyptic number.

27823538664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27823538664 is an abundant number, since it is smaller than the sum of its proper divisors (49477691736).

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

27823538664 is a wasteful number, since it uses less digits than its factorization.

27823538664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22719 (or 22709 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 54.

The spelling of 27823538664 in words is "twenty-seven billion, eight hundred twenty-three million, five hundred thirty-eight thousand, six hundred sixty-four".