9999159318438 has 16 divisors (see below), whose sum is σ = 20034878640960. Its totient is φ = 3326959772136.

The previous prime is 9999159318413. The next prime is 9999159318469. The reversal of 9999159318438 is 8348139519999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1523329948 + ... + 1523336511.

It is an arithmetic number, because the mean of its divisors is an integer number (1252179915060).

Almost surely, 2^{9999159318438} is an apocalyptic number.

9999159318438 is an abundant number, since it is smaller than the sum of its proper divisors (10035719322522).

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

9999159318438 is a wasteful number, since it uses less digits than its factorization.

9999159318438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046667011.

The product of its digits is 680244480, while the sum is 78.

The spelling of 9999159318438 in words is "nine trillion, nine hundred ninety-nine billion, one hundred fifty-nine million, three hundred eighteen thousand, four hundred thirty-eight".