9915044480 has 128 divisors (see below), whose sum is σ = 25958396160. Its totient is φ = 3591475200.

The previous prime is 9915044429. The next prime is 9915044497. The reversal of 9915044480 is 844405199.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 1905242 + ... + 1910438.

It is an arithmetic number, because the mean of its divisors is an integer number (202799970).

Almost surely, 2^9915044480 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 9915044480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12979198080).

9915044480 is an abundant number, since it is smaller than the sum of its proper divisors (16043351680).

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

9915044480 is a wasteful number, since it uses less digits than its factorization.

9915044480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498 (or 5486 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 9915044480 is about 99574.3163672239. The cubic root of 9915044480 is about 2148.3162934831.

The spelling of 9915044480 in words is "nine billion, nine hundred fifteen million, forty-four thousand, four hundred eighty".