9991502442 has 96 divisors (see below), whose sum is σ = 23252261760. Its totient is φ = 3213587520.

The previous prime is 9991502413. The next prime is 9991502447. The reversal of 9991502442 is 2442051999.

It is not an unprimeable number, because it can be changed into a prime (9991502447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1568059 + ... + 1574417.

It is an arithmetic number, because the mean of its divisors is an integer number (242211060).

Almost surely, 2^9991502442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9991502442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11626130880).

9991502442 is an abundant number, since it is smaller than the sum of its proper divisors (13260759318).

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

9991502442 is a wasteful number, since it uses less digits than its factorization.

9991502442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6490 (or 6478 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 9991502442 is about 99957.5031801015. The cubic root of 9991502442 is about 2153.8242693052.

The spelling of 9991502442 in words is "nine billion, nine hundred ninety-one million, five hundred two thousand, four hundred forty-two".