999847800000 has 1008 divisors, whose sum is σ = 4246925679360. Its totient is φ = 228458880000.

The previous prime is 999847799963. The next prime is 999847800101. The reversal of 999847800000 is 8748999.

It is a tau number, because it is divible by the number of its divisors (1008).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 999847800000.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 340198531 + ... + 340201469.

It is an arithmetic number, because the mean of its divisors is an integer number (4213219920).

Almost surely, 2^999847800000 is an apocalyptic number.

999847800000 is a gapful number since it is divisible by the number (90) 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 999847800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2123462839680).

999847800000 is an abundant number, since it is smaller than the sum of its proper divisors (3247077879360).

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

999847800000 is an frugal number, since it uses more digits than its factorization.

999847800000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998 (or 2956 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 999847800000 in words is "nine hundred ninety-nine billion, eight hundred forty-seven million, eight hundred thousand".