9911980944 has 30 divisors (see below), whose sum is σ = 27739780406. Its totient is φ = 3303993600.

The previous prime is 9911980913. The next prime is 9911980961. The reversal of 9911980944 is 4490891199.

It can be written as a sum of positive squares in only one way, i.e., 9739321344 + 172659600 = 98688^2 + 13140^2 .

It is a super-2 number, since 2×9911980944² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34416457 + ... + 34416744.

Almost surely, 2^9911980944 is an apocalyptic number.

It is an amenable number.

9911980944 is an abundant number, since it is smaller than the sum of its proper divisors (17827799462).

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

9911980944 is a wasteful number, since it uses less digits than its factorization.

9911980944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68833215 (or 68833206 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The square root of 9911980944 is about 99558.9320151638. The cubic root of 9911980944 is about 2148.0950094779.

The spelling of 9911980944 in words is "nine billion, nine hundred eleven million, nine hundred eighty thousand, nine hundred forty-four".