28061319193 has 2 divisors, whose sum is σ = 28061319194. Its totient is φ = 28061319192.

The previous prime is 28061319173. The next prime is 28061319259. The reversal of 28061319193 is 39191316082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27148493824 + 912825369 = 164768^2 + 30213^2 .

It is a cyclic number.

It is not a de Polignac number, because 28061319193 - 2¹⁷ = 28061188121 is a prime.

It is not a weakly prime, because it can be changed into another prime (28061319173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14030659596 + 14030659597.

It is an arithmetic number, because the mean of its divisors is an integer number (14030659597).

Almost surely, 2^28061319193 is an apocalyptic number.

It is an amenable number.

28061319193 is a deficient number, since it is larger than the sum of its proper divisors (1).

28061319193 is an equidigital number, since it uses as much as digits as its factorization.

28061319193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 28061319193 in words is "twenty-eight billion, sixty-one million, three hundred nineteen thousand, one hundred ninety-three".