198539580659 has 32 divisors (see below), whose sum is σ = 235070791680. Its totient is φ = 164158140672.

The previous prime is 198539580653. The next prime is 198539580661. The reversal of 198539580659 is 956085935891.

It is a cyclic number.

It is not a de Polignac number, because 198539580659 - 2⁸ = 198539580403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198539580653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57230777 + ... + 57234245.

It is an arithmetic number, because the mean of its divisors is an integer number (7345962240).

Almost surely, 2^198539580659 is an apocalyptic number.

198539580659 is a deficient number, since it is larger than the sum of its proper divisors (36531211021).

198539580659 is a wasteful number, since it uses less digits than its factorization.

198539580659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5979.

The product of its (nonzero) digits is 104976000, while the sum is 68.

The spelling of 198539580659 in words is "one hundred ninety-eight billion, five hundred thirty-nine million, five hundred eighty thousand, six hundred fifty-nine".