28104856469 has 2 divisors, whose sum is σ = 28104856470. Its totient is φ = 28104856468.

The previous prime is 28104856393. The next prime is 28104856471. The reversal of 28104856469 is 96465840182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25772449444 + 2332407025 = 160538^2 + 48295^2 .

It is a cyclic number.

It is not a de Polignac number, because 28104856469 - 2¹⁶ = 28104790933 is a prime.

It is a super-2 number, since 2×28104856469² (a number of 22 digits) contains 22 as substring.

Together with 28104856471, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28104856469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28104850469) 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, 14052428234 + 14052428235.

It is an arithmetic number, because the mean of its divisors is an integer number (14052428235).

Almost surely, 2^28104856469 is an apocalyptic number.

It is an amenable number.

28104856469 is a deficient number, since it is larger than the sum of its proper divisors (1).

28104856469 is an equidigital number, since it uses as much as digits as its factorization.

28104856469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3317760, while the sum is 53.

The spelling of 28104856469 in words is "twenty-eight billion, one hundred four million, eight hundred fifty-six thousand, four hundred sixty-nine".