9999939826968 has 384 divisors, whose sum is σ = 32981735808000. Its totient is φ = 2497409832960.

The previous prime is 9999939826931. The next prime is 9999939826969. The reversal of 9999939826968 is 8696289399999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999939826969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 775844268 + ... + 775857156.

It is an arithmetic number, because the mean of its divisors is an integer number (85889937000).

Almost surely, 2^{9999939826968} is an apocalyptic number.

9999939826968 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9999939826968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16490867904000).

9999939826968 is an abundant number, since it is smaller than the sum of its proper divisors (22981795981032).

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

9999939826968 is a wasteful number, since it uses less digits than its factorization.

9999939826968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15615 (or 15604 counting only the distinct ones).

The product of its digits is 66119763456, while the sum is 96.

The spelling of 9999939826968 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred thirty-nine million, eight hundred twenty-six thousand, nine hundred sixty-eight".