28317718573 has 2 divisors, whose sum is σ = 28317718574. Its totient is φ = 28317718572.

The previous prime is 28317718543. The next prime is 28317718577. The reversal of 28317718573 is 37581771382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28317485284 + 233289 = 168278^2 + 483^2 .

It is a cyclic number.

It is not a de Polignac number, because 28317718573 - 2²¹ = 28315621421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28317718573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28317718577) 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, 14158859286 + 14158859287.

It is an arithmetic number, because the mean of its divisors is an integer number (14158859287).

Almost surely, 2^28317718573 is an apocalyptic number.

It is an amenable number.

28317718573 is a deficient number, since it is larger than the sum of its proper divisors (1).

28317718573 is an equidigital number, since it uses as much as digits as its factorization.

28317718573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1975680, while the sum is 52.

The spelling of 28317718573 in words is "twenty-eight billion, three hundred seventeen million, seven hundred eighteen thousand, five hundred seventy-three".