9999993999968 has 24 divisors (see below), whose sum is σ = 22499986500432. Its totient is φ = 4285711714176.

The previous prime is 9999993999967. The next prime is 9999993999971. The reversal of 9999993999968 is 8699993999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999993999967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22321414955 + ... + 22321415402.

It is an arithmetic number, because the mean of its divisors is an integer number (937499437518).

Almost surely, 2^{9999993999968} is an apocalyptic number.

It is an amenable number.

9999993999968 is an abundant number, since it is smaller than the sum of its proper divisors (12499992500464).

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

9999993999968 is a wasteful number, since it uses less digits than its factorization.

9999993999968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44642830374 (or 44642830366 counting only the distinct ones).

The product of its digits is 502096953744, while the sum is 107.

The spelling of 9999993999968 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred ninety-three million, nine hundred ninety-nine thousand, nine hundred sixty-eight".