9944486643888 has 100 divisors (see below), whose sum is σ = 28783225610568. Its totient is φ = 3314714158080.

The previous prime is 9944486643829. The next prime is 9944486643899. The reversal of 9944486643888 is 8883466844499.

It is a happy number.

9944486643888 is a `hidden beast` number, since 9 + 9 + 4 + 4 + 48 + 66 + 438 + 88 = 666.

It is a super-2 number, since 2×9944486643888² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42642643 + ... + 42875213.

Almost surely, 2^{9944486643888} is an apocalyptic number.

It is an amenable number.

9944486643888 is an abundant number, since it is smaller than the sum of its proper divisors (18838738966680).

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

9944486643888 is a wasteful number, since it uses less digits than its factorization.

9944486643888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265584 (or 265569 counting only the distinct ones).

The product of its digits is 9172942848, while the sum is 81.

The spelling of 9944486643888 in words is "nine trillion, nine hundred forty-four billion, four hundred eighty-six million, six hundred forty-three thousand, eight hundred eighty-eight".