27564066983 has 4 divisors (see below), whose sum is σ = 27848232720. Its totient is φ = 27279901248.

The previous prime is 27564066977. The next prime is 27564067051. The reversal of 27564066983 is 38966046572.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27564066983 - 2⁴ = 27564066967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27564063983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142082723 + ... + 142082916.

It is an arithmetic number, because the mean of its divisors is an integer number (6962058180).

Almost surely, 2^27564066983 is an apocalyptic number.

27564066983 is a deficient number, since it is larger than the sum of its proper divisors (284165737).

27564066983 is an equidigital number, since it uses as much as digits as its factorization.

27564066983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284165736.

The product of its (nonzero) digits is 13063680, while the sum is 56.

The spelling of 27564066983 in words is "twenty-seven billion, five hundred sixty-four million, sixty-six thousand, nine hundred eighty-three".