9980549920 has 96 divisors (see below), whose sum is σ = 25872073920. Its totient is φ = 3608202240.

The previous prime is 9980549911. The next prime is 9980549921. The reversal of 9980549920 is 299450899.

It is a super-2 number, since 2×9980549920² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (9980549921) 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, 288091 + ... + 320869.

It is an arithmetic number, because the mean of its divisors is an integer number (269500770).

Almost surely, 2^9980549920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9980549920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12936036960).

9980549920 is an abundant number, since it is smaller than the sum of its proper divisors (15891524000).

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

9980549920 is a wasteful number, since it uses less digits than its factorization.

9980549920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32978 (or 32970 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 55.

The square root of 9980549920 is about 99902.7022657546. The cubic root of 9980549920 is about 2153.0369858887.

The spelling of 9980549920 in words is "nine billion, nine hundred eighty million, five hundred forty-nine thousand, nine hundred twenty".