9999945444 has 24 divisors (see below), whose sum is σ = 23335730208. Its totient is φ = 3332954560.

The previous prime is 9999945413. The next prime is 9999945467. The reversal of 9999945444 is 4445499999.

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, 85639 + ... + 165329.

It is an arithmetic number, because the mean of its divisors is an integer number (972322092).

Almost surely, 2^9999945444 is an apocalyptic number.

It is an amenable number.

9999945444 is an abundant number, since it is smaller than the sum of its proper divisors (13335784764).

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

9999945444 is a wasteful number, since it uses less digits than its factorization.

9999945444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90155 (or 90153 counting only the distinct ones).

The product of its digits is 75582720, while the sum is 66.

The square root of 9999945444 is about 99999.7272196280. The cubic root of 9999945444 is about 2154.4307721135.

The spelling of 9999945444 in words is "nine billion, nine hundred ninety-nine million, nine hundred forty-five thousand, four hundred forty-four".