28685067497 has 2 divisors, whose sum is σ = 28685067498. Its totient is φ = 28685067496.

The previous prime is 28685067473. The next prime is 28685067539. The reversal of 28685067497 is 79476058682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18929357056 + 9755710441 = 137584^2 + 98771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28685067497 is a prime.

It is not a weakly prime, because it can be changed into another prime (28685067407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14342533748 + 14342533749.

It is an arithmetic number, because the mean of its divisors is an integer number (14342533749).

Almost surely, 2^28685067497 is an apocalyptic number.

It is an amenable number.

28685067497 is a deficient number, since it is larger than the sum of its proper divisors (1).

28685067497 is an equidigital number, since it uses as much as digits as its factorization.

28685067497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40642560, while the sum is 62.

The spelling of 28685067497 in words is "twenty-eight billion, six hundred eighty-five million, sixty-seven thousand, four hundred ninety-seven".