17718472489 has 2 divisors, whose sum is σ = 17718472490. Its totient is φ = 17718472488.

The previous prime is 17718472483. The next prime is 17718472567. The reversal of 17718472489 is 98427481771.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17600532889 + 117939600 = 132667^2 + 10860^2 .

It is an emirp because it is prime and its reverse (98427481771) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17718472489 - 2³ = 17718472481 is a prime.

It is not a weakly prime, because it can be changed into another prime (17718472481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8859236244 + 8859236245.

It is an arithmetic number, because the mean of its divisors is an integer number (8859236245).

Almost surely, 2^17718472489 is an apocalyptic number.

It is an amenable number.

17718472489 is a deficient number, since it is larger than the sum of its proper divisors (1).

17718472489 is an equidigital number, since it uses as much as digits as its factorization.

17718472489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6322176, while the sum is 58.

The spelling of 17718472489 in words is "seventeen billion, seven hundred eighteen million, four hundred seventy-two thousand, four hundred eighty-nine".