990554154024424 has 192 divisors, whose sum is σ = 2141447838969600. Its totient is φ = 428725987683840.

The previous prime is 990554154024403. The next prime is 990554154024427. The reversal of 990554154024424 is 424420451455099.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (990554154024427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33631674882 + ... + 33631704334.

It is an arithmetic number, because the mean of its divisors is an integer number (11153374161300).

Almost surely, 2^{990554154024424} is an apocalyptic number.

990554154024424 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990554154024424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1070723919484800).

990554154024424 is an abundant number, since it is smaller than the sum of its proper divisors (1150893684945176).

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

990554154024424 is a wasteful number, since it uses less digits than its factorization.

990554154024424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49544 (or 49529 counting only the distinct ones).

The product of its (nonzero) digits is 41472000, while the sum is 58.

The spelling of 990554154024424 in words is "nine hundred ninety trillion, five hundred fifty-four billion, one hundred fifty-four million, twenty-four thousand, four hundred twenty-four".