9999642433568 has 54 divisors (see below), whose sum is σ = 19747804787613. Its totient is φ = 4984374735360.

The previous prime is 9999642433493. The next prime is 9999642433579. The reversal of 9999642433568 is 8653342469999.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 5554072597264 + 4445569836304 = 2356708^2 + 2108452^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2236028.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7709823896 + ... + 7709825192.

Almost surely, 2^{9999642433568} is an apocalyptic number.

It is an amenable number.

9999642433568 is a deficient number, since it is larger than the sum of its proper divisors (9748162354045).

9999642433568 is an frugal number, since it uses more digits than its factorization.

9999642433568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466 (or 1730 counting only the distinct ones).

The product of its digits is 2720977920, while the sum is 77.

The spelling of 9999642433568 in words is "nine trillion, nine hundred ninety-nine billion, six hundred forty-two million, four hundred thirty-three thousand, five hundred sixty-eight".