28451564593 has 2 divisors, whose sum is σ = 28451564594. Its totient is φ = 28451564592.

The previous prime is 28451564591. The next prime is 28451564623. The reversal of 28451564593 is 39546515482.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21044724624 + 7406839969 = 145068^2 + 86063^2 .

It is a cyclic number.

It is not a de Polignac number, because 28451564593 - 2¹ = 28451564591 is a prime.

Together with 28451564591, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28451564593.

It is not a weakly prime, because it can be changed into another prime (28451564591) 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, 14225782296 + 14225782297.

It is an arithmetic number, because the mean of its divisors is an integer number (14225782297).

Almost surely, 2^28451564593 is an apocalyptic number.

It is an amenable number.

28451564593 is a deficient number, since it is larger than the sum of its proper divisors (1).

28451564593 is an equidigital number, since it uses as much as digits as its factorization.

28451564593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184000, while the sum is 52.

The spelling of 28451564593 in words is "twenty-eight billion, four hundred fifty-one million, five hundred sixty-four thousand, five hundred ninety-three".