9981124980 has 24 divisors (see below), whose sum is σ = 27947150112. Its totient is φ = 2661633312.

The previous prime is 9981124943. The next prime is 9981125023. The reversal of 9981124980 is 894211899.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83175982 + ... + 83176101.

It is an arithmetic number, because the mean of its divisors is an integer number (1164464588).

Almost surely, 2^9981124980 is an apocalyptic number.

It is an amenable number.

9981124980 is an abundant number, since it is smaller than the sum of its proper divisors (17966025132).

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

9981124980 is a wasteful number, since it uses less digits than its factorization.

9981124980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166352095 (or 166352093 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 51.

The square root of 9981124980 is about 99905.5803246245. The cubic root of 9981124980 is about 2153.0783363714.

The spelling of 9981124980 in words is "nine billion, nine hundred eighty-one million, one hundred twenty-four thousand, nine hundred eighty".