990003584896944 has 40 divisors (see below), whose sum is σ = 2557516160489472. Its totient is φ = 330000304706880.

The previous prime is 990003584896943. The next prime is 990003584896987. The reversal of 990003584896944 is 449698485300099.

It is a self number, because there is not a number n which added to its sum of digits gives 990003584896944.

It is not an unprimeable number, because it can be changed into a prime (990003584896943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9721212 + ... + 45546779.

Almost surely, 2^{990003584896944} is an apocalyptic number.

It is an amenable number.

990003584896944 is an abundant number, since it is smaller than the sum of its proper divisors (1567512575592528).

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

990003584896944 is a wasteful number, since it uses less digits than its factorization.

990003584896944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55641185 (or 55641179 counting only the distinct ones).

The product of its (nonzero) digits is 2418647040, while the sum is 78.

The spelling of 990003584896944 in words is "nine hundred ninety trillion, three billion, five hundred eighty-four million, eight hundred ninety-six thousand, nine hundred forty-four".