9980611992 has 320 divisors, whose sum is σ = 32004403200. Its totient is φ = 2880541440.

The previous prime is 9980611987. The next prime is 9980611999. The reversal of 9980611992 is 2991160899.

It is a super-2 number, since 2×9980611992² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9980611999) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 20326867 + ... + 20327357.

It is an arithmetic number, because the mean of its divisors is an integer number (100013760).

Almost surely, 2^9980611992 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 9980611992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16002201600).

9980611992 is an abundant number, since it is smaller than the sum of its proper divisors (22023791208).

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

9980611992 is a wasteful number, since it uses less digits than its factorization.

9980611992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 54.

The square root of 9980611992 is about 99903.0129275389. The cubic root of 9980611992 is about 2153.0414493380.

The spelling of 9980611992 in words is "nine billion, nine hundred eighty million, six hundred eleven thousand, nine hundred ninety-two".