9991334432 has 24 divisors (see below), whose sum is σ = 20041583436. Its totient is φ = 4901408512.

The previous prime is 9991334429. The next prime is 9991334449. The reversal of 9991334432 is 2344331999.

It can be written as a sum of positive squares in 2 ways, for example, as 9991201936 + 132496 = 99956^2 + 364^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2943863 + ... + 2947254.

Almost surely, 2^9991334432 is an apocalyptic number.

It is an amenable number.

9991334432 is an abundant number, since it is smaller than the sum of its proper divisors (10050249004).

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

9991334432 is a wasteful number, since it uses less digits than its factorization.

9991334432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5891180 (or 5891172 counting only the distinct ones).

The product of its digits is 629856, while the sum is 47.

The square root of 9991334432 is about 99956.6627694222. The cubic root of 9991334432 is about 2153.8121968451.

The spelling of 9991334432 in words is "nine billion, nine hundred ninety-one million, three hundred thirty-four thousand, four hundred thirty-two".