9991324758 has 16 divisors (see below), whose sum is σ = 19983790080. Its totient is φ = 3330251496.

The previous prime is 9991324757. The next prime is 9991324771. The reversal of 9991324758 is 8574231999.

It is a junction number, because it is equal to n+sod(n) for n = 9991324698 and 9991324707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9991324751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103063 + ... + 174941.

It is an arithmetic number, because the mean of its divisors is an integer number (1248986880).

Almost surely, 2^9991324758 is an apocalyptic number.

9991324758 is an abundant number, since it is smaller than the sum of its proper divisors (9992465322).

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

9991324758 is a wasteful number, since it uses less digits than its factorization.

9991324758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95051.

The product of its digits is 4898880, while the sum is 57.

The square root of 9991324758 is about 99956.6143784392. The cubic root of 9991324758 is about 2153.8115017098.

The spelling of 9991324758 in words is "nine billion, nine hundred ninety-one million, three hundred twenty-four thousand, seven hundred fifty-eight".