27243861984 has 36 divisors (see below), whose sum is σ = 77474733336. Its totient is φ = 9081287232.

The previous prime is 27243861959. The next prime is 27243861991. The reversal of 27243861984 is 48916834272.

27243861984 is a `hidden beast` number, since 2 + 72 + 4 + 386 + 198 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 27243861984.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47298084 + ... + 47298659.

It is an arithmetic number, because the mean of its divisors is an integer number (2152075926).

Almost surely, 2^27243861984 is an apocalyptic number.

27243861984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27243861984 is an abundant number, since it is smaller than the sum of its proper divisors (50230871352).

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

27243861984 is a wasteful number, since it uses less digits than its factorization.

27243861984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94596759 (or 94596748 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The spelling of 27243861984 in words is "twenty-seven billion, two hundred forty-three million, eight hundred sixty-one thousand, nine hundred eighty-four".