999808315344 has 120 divisors (see below), whose sum is σ = 2856988480320. Its totient is φ = 326325136896.

The previous prime is 999808315343. The next prime is 999808315351. The reversal of 999808315344 is 443513808999.

999808315344 is a `hidden beast` number, since 9 + 9 + 98 + 0 + 8 + 3 + 1 + 534 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999808315343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 941347 + ... + 1698749.

It is an arithmetic number, because the mean of its divisors is an integer number (23808237336).

Almost surely, 2^999808315344 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 999808315344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1428494240160).

999808315344 is an abundant number, since it is smaller than the sum of its proper divisors (1857180164976).

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

999808315344 is a wasteful number, since it uses less digits than its factorization.

999808315344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757609 (or 757600 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 63.

The spelling of 999808315344 in words is "nine hundred ninety-nine billion, eight hundred eight million, three hundred fifteen thousand, three hundred forty-four".