28110568489 has 2 divisors, whose sum is σ = 28110568490. Its totient is φ = 28110568488.

The previous prime is 28110568471. The next prime is 28110568529. The reversal of 28110568489 is 98486501182.

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., 25533483264 + 2577085225 = 159792^2 + 50765^2 .

It is a cyclic number.

It is not a de Polignac number, because 28110568489 - 2⁷ = 28110568361 is a prime.

It is not a weakly prime, because it can be changed into another prime (28110568459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14055284244 + 14055284245.

It is an arithmetic number, because the mean of its divisors is an integer number (14055284245).

Almost surely, 2^28110568489 is an apocalyptic number.

It is an amenable number.

28110568489 is a deficient number, since it is larger than the sum of its proper divisors (1).

28110568489 is an equidigital number, since it uses as much as digits as its factorization.

28110568489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1105920, while the sum is 52.

The spelling of 28110568489 in words is "twenty-eight billion, one hundred ten million, five hundred sixty-eight thousand, four hundred eighty-nine".