27983681567 has 2 divisors, whose sum is σ = 27983681568. Its totient is φ = 27983681566.

The previous prime is 27983681477. The next prime is 27983681597. The reversal of 27983681567 is 76518638972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27983681567 - 2³⁰ = 26909939743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27983681597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13991840783 + 13991840784.

It is an arithmetic number, because the mean of its divisors is an integer number (13991840784).

Almost surely, 2^27983681567 is an apocalyptic number.

27983681567 is a deficient number, since it is larger than the sum of its proper divisors (1).

27983681567 is an equidigital number, since it uses as much as digits as its factorization.

27983681567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 62.

The spelling of 27983681567 in words is "twenty-seven billion, nine hundred eighty-three million, six hundred eighty-one thousand, five hundred sixty-seven".