9853808985 has 12 divisors (see below), whose sum is σ = 17079935652. Its totient is φ = 5255364768.

The previous prime is 9853808983. The next prime is 9853809029. The reversal of 9853808985 is 5898083589.

9853808985 is a `hidden beast` number, since 9 + 8 + 538 + 0 + 8 + 98 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1865203344 + 7988605641 = 43188^2 + 89379^2 .

It is not a de Polignac number, because 9853808985 - 2¹ = 9853808983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9853808983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109486722 + ... + 109486811.

It is an arithmetic number, because the mean of its divisors is an integer number (1423327971).

Almost surely, 2^9853808985 is an apocalyptic number.

It is an amenable number.

9853808985 is a deficient number, since it is larger than the sum of its proper divisors (7226126667).

9853808985 is a wasteful number, since it uses less digits than its factorization.

9853808985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218973544 (or 218973541 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 63.

The square root of 9853808985 is about 99266.3537408320. The cubic root of 9853808985 is about 2143.8844770988.

The spelling of 9853808985 in words is "nine billion, eight hundred fifty-three million, eight hundred eight thousand, nine hundred eighty-five".