9991412442 has 24 divisors (see below), whose sum is σ = 23616066240. Its totient is φ = 3027700680.

The previous prime is 9991412441. The next prime is 9991412443. The reversal of 9991412442 is 2442141999.

It is a happy number.

9991412442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9991412441) and next prime (9991412443).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (9991412441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25230642 + ... + 25231037.

It is an arithmetic number, because the mean of its divisors is an integer number (984002760).

Almost surely, 2^9991412442 is an apocalyptic number.

9991412442 is an abundant number, since it is smaller than the sum of its proper divisors (13624653798).

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

9991412442 is a wasteful number, since it uses less digits than its factorization.

9991412442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50461698 (or 50461695 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 9991412442 is about 99957.0529877707. The cubic root of 9991412442 is about 2153.8178023176.

The spelling of 9991412442 in words is "nine billion, nine hundred ninety-one million, four hundred twelve thousand, four hundred forty-two".