9798327331985 has 16 divisors (see below), whose sum is σ = 11865256921296. Its totient is φ = 7767190007808.

The previous prime is 9798327331981. The next prime is 9798327331987. The reversal of 9798327331985 is 5891337238979.

9798327331985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 3130228²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 2175338859409 + 7622988472576 = 1474903^2 + 2760976^2 .

It is a cyclic number.

It is not a de Polignac number, because 9798327331985 - 2² = 9798327331981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9798327331981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256634 + ... + 4434243.

It is an arithmetic number, because the mean of its divisors is an integer number (741578557581).

Almost surely, 2^{9798327331985} is an apocalyptic number.

It is an amenable number.

9798327331985 is a deficient number, since it is larger than the sum of its proper divisors (2066929589311).

9798327331985 is a wasteful number, since it uses less digits than its factorization.

9798327331985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4694692.

The product of its digits is 617258880, while the sum is 74.

The spelling of 9798327331985 in words is "nine trillion, seven hundred ninety-eight billion, three hundred twenty-seven million, three hundred thirty-one thousand, nine hundred eighty-five".