28828365569 has 2 divisors, whose sum is σ = 28828365570. Its totient is φ = 28828365568.

The previous prime is 28828365551. The next prime is 28828365583. The reversal of 28828365569 is 96556382882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15329411344 + 13498954225 = 123812^2 + 116185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28828365569 is a prime.

It is a super-2 number, since 2×28828365569² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28828365589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14414182784 + 14414182785.

It is an arithmetic number, because the mean of its divisors is an integer number (14414182785).

Almost surely, 2^28828365569 is an apocalyptic number.

It is an amenable number.

28828365569 is a deficient number, since it is larger than the sum of its proper divisors (1).

28828365569 is an equidigital number, since it uses as much as digits as its factorization.

28828365569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49766400, while the sum is 62.

The spelling of 28828365569 in words is "twenty-eight billion, eight hundred twenty-eight million, three hundred sixty-five thousand, five hundred sixty-nine".