9985479842 has 16 divisors (see below), whose sum is σ = 16147571832. Its totient is φ = 4603774080.

The previous prime is 9985479817. The next prime is 9985479913. The reversal of 9985479842 is 2489745899.

It can be written as a sum of positive squares in 4 ways, for example, as 7238776561 + 2746703281 = 85081^2 + 52409^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179603 + ... + 228534.

Almost surely, 2^9985479842 is an apocalyptic number.

9985479842 is a deficient number, since it is larger than the sum of its proper divisors (6162091990).

9985479842 is a wasteful number, since it uses less digits than its factorization.

9985479842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409093.

The product of its digits is 52254720, while the sum is 65.

The square root of 9985479842 is about 99927.3728364756. The cubic root of 9985479842 is about 2153.3914271875.

The spelling of 9985479842 in words is "nine billion, nine hundred eighty-five million, four hundred seventy-nine thousand, eight hundred forty-two".