27728564593 has 2 divisors, whose sum is σ = 27728564594. Its totient is φ = 27728564592.

The previous prime is 27728564587. The next prime is 27728564599. The reversal of 27728564593 is 39546582772.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (27728564587) and next prime (27728564599).

It can be written as a sum of positive squares in only one way, i.e., 23656593249 + 4071971344 = 153807^2 + 63812^2 .

It is a cyclic number.

It is not a de Polignac number, because 27728564593 - 2¹⁷ = 27728433521 is a prime.

It is not a weakly prime, because it can be changed into another prime (27728564599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13864282296 + 13864282297.

It is an arithmetic number, because the mean of its divisors is an integer number (13864282297).

Almost surely, 2^27728564593 is an apocalyptic number.

It is an amenable number.

27728564593 is a deficient number, since it is larger than the sum of its proper divisors (1).

27728564593 is an equidigital number, since it uses as much as digits as its factorization.

27728564593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25401600, while the sum is 58.

The spelling of 27728564593 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred sixty-four thousand, five hundred ninety-three".