9998543532 has 96 divisors (see below), whose sum is σ = 24612456960. Its totient is φ = 3153047040.

The previous prime is 9998543497. The next prime is 9998543537. The reversal of 9998543532 is 2353458999.

It is a super-2 number, since 2×9998543532² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9998543537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11639319 + ... + 11640177.

It is an arithmetic number, because the mean of its divisors is an integer number (256379760).

Almost surely, 2^9998543532 is an apocalyptic number.

9998543532 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9998543532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12306228480).

9998543532 is an abundant number, since it is smaller than the sum of its proper divisors (14613913428).

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

9998543532 is a wasteful number, since it uses less digits than its factorization.

9998543532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303 (or 1301 counting only the distinct ones).

The product of its digits is 10497600, while the sum is 57.

The square root of 9998543532 is about 99992.7173948183. The cubic root of 9998543532 is about 2154.3300894473.

The spelling of 9998543532 in words is "nine billion, nine hundred ninety-eight million, five hundred forty-three thousand, five hundred thirty-two".