9918843276944 has 80 divisors (see below), whose sum is σ = 23266722227328. Its totient is φ = 3998878980096.

The previous prime is 9918843276913. The next prime is 9918843276977. The reversal of 9918843276944 is 4496723488199.

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, 2513294 + ... + 5114130.

Almost surely, 2^{9918843276944} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9918843276944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11633361113664).

9918843276944 is an abundant number, since it is smaller than the sum of its proper divisors (13347878950384).

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

9918843276944 is a wasteful number, since it uses less digits than its factorization.

9918843276944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602872 (or 2602866 counting only the distinct ones).

The product of its digits is 752467968, while the sum is 74.

The spelling of 9918843276944 in words is "nine trillion, nine hundred eighteen billion, eight hundred forty-three million, two hundred seventy-six thousand, nine hundred forty-four".