999989083740816 has 675 divisors, whose sum is σ = 3138982359486207. Its totient is φ = 297171523733760.

The previous prime is 999989083740761. The next prime is 999989083740877. The reversal of 999989083740816 is 618047380989999.

The square root of 999989083740816 is 31622604.

It is a perfect power (a square), and thus also a powerful number.

999989083740816 is a `hidden beast` number, since 9 + 9 + 99 + 89 + 0 + 8 + 37 + 408 + 1 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 495810560374416 + 504178523366400 = 22266804^2 + 22453920^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 1988049868021 + ... + 1988049868523.

Almost surely, 2^{999989083740816} is an apocalyptic number.

999989083740816 is the 31622604-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999989083740816

999989083740816 is an abundant number, since it is smaller than the sum of its proper divisors (2138993275745391).

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

999989083740816 is an frugal number, since it uses more digits than its factorization.

999989083740816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 15237476352, while the sum is 90.

The spelling of 999989083740816 in words is "nine hundred ninety-nine trillion, nine hundred eighty-nine billion, eighty-three million, seven hundred forty thousand, eight hundred sixteen".