9985555900 has 36 divisors (see below), whose sum is σ = 21679909272. Its totient is φ = 3992148160.

The previous prime is 9985555883. The next prime is 9985555907. The reversal of 9985555900 is 95555899.

It is a super-2 number, since 2×9985555900² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9985555907) 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, 175374 + ... + 225226.

It is an arithmetic number, because the mean of its divisors is an integer number (602219702).

Almost surely, 2^9985555900 is an apocalyptic number.

It is an amenable number.

9985555900 is an abundant number, since it is smaller than the sum of its proper divisors (11694353372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9985555900 is a wasteful number, since it uses less digits than its factorization.

9985555900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51870 (or 51863 counting only the distinct ones).

The product of its (nonzero) digits is 3645000, while the sum is 55.

The square root of 9985555900 is about 99927.7534021455. The cubic root of 9985555900 is about 2153.3968945338.

The spelling of 9985555900 in words is "nine billion, nine hundred eighty-five million, five hundred fifty-five thousand, nine hundred".