28320775453 has 2 divisors, whose sum is σ = 28320775454. Its totient is φ = 28320775452.

The previous prime is 28320775433. The next prime is 28320775519. The reversal of 28320775453 is 35457702382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24279249124 + 4041526329 = 155818^2 + 63573^2 .

It is a cyclic number.

It is not a de Polignac number, because 28320775453 - 2⁵ = 28320775421 is a prime.

It is a super-3 number, since 3×28320775453³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28320775433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14160387726 + 14160387727.

It is an arithmetic number, because the mean of its divisors is an integer number (14160387727).

Almost surely, 2^28320775453 is an apocalyptic number.

It is an amenable number.

28320775453 is a deficient number, since it is larger than the sum of its proper divisors (1).

28320775453 is an equidigital number, since it uses as much as digits as its factorization.

28320775453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1411200, while the sum is 46.

The spelling of 28320775453 in words is "twenty-eight billion, three hundred twenty million, seven hundred seventy-five thousand, four hundred fifty-three".