28217568307597 has 2 divisors, whose sum is σ = 28217568307598. Its totient is φ = 28217568307596.

The previous prime is 28217568307561. The next prime is 28217568307633. The reversal of 28217568307597 is 79570386571282.

It is a balanced prime because it is at equal distance from previous prime (28217568307561) and next prime (28217568307633).

It can be written as a sum of positive squares in only one way, i.e., 22805342944036 + 5412225363561 = 4775494^2 + 2326419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28217568307597 is a prime.

It is a super-2 number, since 2×28217568307597² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28217568307897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14108784153798 + 14108784153799.

It is an arithmetic number, because the mean of its divisors is an integer number (14108784153799).

Almost surely, 2^{28217568307597} is an apocalyptic number.

It is an amenable number.

28217568307597 is a deficient number, since it is larger than the sum of its proper divisors (1).

28217568307597 is an equidigital number, since it uses as much as digits as its factorization.

28217568307597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 355622400, while the sum is 70.

The spelling of 28217568307597 in words is "twenty-eight trillion, two hundred seventeen billion, five hundred sixty-eight million, three hundred seven thousand, five hundred ninety-seven".