9841994217556 has 48 divisors (see below), whose sum is σ = 17381714611968. Its totient is φ = 4876004044800.

The previous prime is 9841994217553. The next prime is 9841994217569. The reversal of 9841994217556 is 6557124991489.

It is a super-2 number, since 2×9841994217556² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9841994217551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1282674936 + ... + 1282682608.

It is an arithmetic number, because the mean of its divisors is an integer number (362119054416).

Almost surely, 2^{9841994217556} is an apocalyptic number.

It is an amenable number.

9841994217556 is a deficient number, since it is larger than the sum of its proper divisors (7539720394412).

9841994217556 is a wasteful number, since it uses less digits than its factorization.

9841994217556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14272 (or 14270 counting only the distinct ones).

The product of its digits is 195955200, while the sum is 70.

The spelling of 9841994217556 in words is "nine trillion, eight hundred forty-one billion, nine hundred ninety-four million, two hundred seventeen thousand, five hundred fifty-six".