9318996978438 has 32 divisors (see below), whose sum is σ = 21300687671040. Its totient is φ = 2662555171680.

The previous prime is 9318996978419. The next prime is 9318996978443. The reversal of 9318996978438 is 8348796998139.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8116533 + ... + 9193263.

It is an arithmetic number, because the mean of its divisors is an integer number (665646489720).

Almost surely, 2^{9318996978438} is an apocalyptic number.

9318996978438 is an abundant number, since it is smaller than the sum of its proper divisors (11981690692602).

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

9318996978438 is a wasteful number, since it uses less digits than its factorization.

9318996978438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282812.

The product of its digits is 5079158784, while the sum is 84.

The spelling of 9318996978438 in words is "nine trillion, three hundred eighteen billion, nine hundred ninety-six million, nine hundred seventy-eight thousand, four hundred thirty-eight".