28484845122689 has 2 divisors, whose sum is σ = 28484845122690. Its totient is φ = 28484845122688.

The previous prime is 28484845122661. The next prime is 28484845122749. The reversal of 28484845122689 is 98622154848482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16921499280625 + 11563345842064 = 4113575^2 + 3400492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28484845122689 is a prime.

It is a super-2 number, since 2×28484845122689² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28484845122389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14242422561344 + 14242422561345.

It is an arithmetic number, because the mean of its divisors is an integer number (14242422561345).

Almost surely, 2^{28484845122689} is an apocalyptic number.

It is an amenable number.

28484845122689 is a deficient number, since it is larger than the sum of its proper divisors (1).

28484845122689 is an equidigital number, since it uses as much as digits as its factorization.

28484845122689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 566231040, while the sum is 71.

The spelling of 28484845122689 in words is "twenty-eight trillion, four hundred eighty-four billion, eight hundred forty-five million, one hundred twenty-two thousand, six hundred eighty-nine".