28917566793593 has 2 divisors, whose sum is σ = 28917566793594. Its totient is φ = 28917566793592.

The previous prime is 28917566793581. The next prime is 28917566793629. The reversal of 28917566793593 is 39539766571982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26819275485289 + 2098291308304 = 5178733^2 + 1448548^2 .

It is a cyclic number.

It is not a de Polignac number, because 28917566793593 - 2⁸ = 28917566793337 is a prime.

It is not a weakly prime, because it can be changed into another prime (28917566799593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14458783396796 + 14458783396797.

It is an arithmetic number, because the mean of its divisors is an integer number (14458783396797).

Almost surely, 2^{28917566793593} is an apocalyptic number.

It is an amenable number.

28917566793593 is a deficient number, since it is larger than the sum of its proper divisors (1).

28917566793593 is an equidigital number, since it uses as much as digits as its factorization.

28917566793593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4629441600, while the sum is 80.

The spelling of 28917566793593 in words is "twenty-eight trillion, nine hundred seventeen billion, five hundred sixty-six million, seven hundred ninety-three thousand, five hundred ninety-three".