999843054312 has 256 divisors, whose sum is σ = 2838144614400. Its totient is φ = 291856055040.

The previous prime is 999843054311. The next prime is 999843054341. The reversal of 999843054312 is 213450348999.

It is a super-2 number, since 2×999843054312² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (999843054311) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 288386803 + ... + 288390269.

It is an arithmetic number, because the mean of its divisors is an integer number (11086502400).

Almost surely, 2^999843054312 is an apocalyptic number.

999843054312 is a gapful number since it is divisible by the number (92) 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 999843054312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1419072307200).

999843054312 is an abundant number, since it is smaller than the sum of its proper divisors (1838301560088).

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

999843054312 is a wasteful number, since it uses less digits than its factorization.

999843054312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436 (or 4432 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 999843054312 in words is "nine hundred ninety-nine billion, eight hundred forty-three million, fifty-four thousand, three hundred twelve".