28568371697 has 2 divisors, whose sum is σ = 28568371698. Its totient is φ = 28568371696.

The previous prime is 28568371681. The next prime is 28568371739. The reversal of 28568371697 is 79617386582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26668196416 + 1900175281 = 163304^2 + 43591^2 .

It is a cyclic number.

It is not a de Polignac number, because 28568371697 - 2⁴ = 28568371681 is a prime.

It is a super-2 number, since 2×28568371697² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28568373697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14284185848 + 14284185849.

It is an arithmetic number, because the mean of its divisors is an integer number (14284185849).

Almost surely, 2^28568371697 is an apocalyptic number.

It is an amenable number.

28568371697 is a deficient number, since it is larger than the sum of its proper divisors (1).

28568371697 is an equidigital number, since it uses as much as digits as its factorization.

28568371697 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 28568371697 in words is "twenty-eight billion, five hundred sixty-eight million, three hundred seventy-one thousand, six hundred ninety-seven".