17989779009 has 8 divisors (see below), whose sum is σ = 24032237152. Its totient is φ = 11970253440.

The previous prime is 17989779001. The next prime is 17989779019. The reversal of 17989779009 is 90097798971.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 17989779009 - 2³ = 17989779001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17989779001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5731312 + ... + 5734449.

It is an arithmetic number, because the mean of its divisors is an integer number (3004029644).

Almost surely, 2^17989779009 is an apocalyptic number.

It is an amenable number.

17989779009 is a deficient number, since it is larger than the sum of its proper divisors (6042458143).

17989779009 is a wasteful number, since it uses less digits than its factorization.

17989779009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11466287.

The product of its (nonzero) digits is 18003384, while the sum is 66.

The spelling of 17989779009 in words is "seventeen billion, nine hundred eighty-nine million, seven hundred seventy-nine thousand, nine".