28604618717 has 2 divisors, whose sum is σ = 28604618718. Its totient is φ = 28604618716.

The previous prime is 28604618639. The next prime is 28604618719. The reversal of 28604618717 is 71781640682.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23349673636 + 5254945081 = 152806^2 + 72491^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28604618717 is a prime.

Together with 28604618719, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28604618719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14302309358 + 14302309359.

It is an arithmetic number, because the mean of its divisors is an integer number (14302309359).

Almost surely, 2^28604618717 is an apocalyptic number.

It is an amenable number.

28604618717 is a deficient number, since it is larger than the sum of its proper divisors (1).

28604618717 is an equidigital number, since it uses as much as digits as its factorization.

28604618717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 28604618717 in words is "twenty-eight billion, six hundred four million, six hundred eighteen thousand, seven hundred seventeen".