27654561364673 has 2 divisors, whose sum is σ = 27654561364674. Its totient is φ = 27654561364672.

The previous prime is 27654561364667. The next prime is 27654561364697. The reversal of 27654561364673 is 37646316545672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27639592331569 + 14969033104 = 5257337^2 + 122348^2 .

It is a cyclic number.

It is not a de Polignac number, because 27654561364673 - 2⁴ = 27654561364657 is a prime.

It is not a weakly prime, because it can be changed into another prime (27654561384673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13827280682336 + 13827280682337.

It is an arithmetic number, because the mean of its divisors is an integer number (13827280682337).

Almost surely, 2^{27654561364673} is an apocalyptic number.

It is an amenable number.

27654561364673 is a deficient number, since it is larger than the sum of its proper divisors (1).

27654561364673 is an equidigital number, since it uses as much as digits as its factorization.

27654561364673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 457228800, while the sum is 65.

The spelling of 27654561364673 in words is "twenty-seven trillion, six hundred fifty-four billion, five hundred sixty-one million, three hundred sixty-four thousand, six hundred seventy-three".