9816394812 has 144 divisors (see below), whose sum is σ = 27168261120. Its totient is φ = 2750122368.

The previous prime is 9816394771. The next prime is 9816394823. The reversal of 9816394812 is 2184936189.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6600733 + ... + 6602219.

It is an arithmetic number, because the mean of its divisors is an integer number (188668480).

Almost surely, 2^9816394812 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 9816394812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13584130560).

9816394812 is an abundant number, since it is smaller than the sum of its proper divisors (17351866308).

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

9816394812 is a wasteful number, since it uses less digits than its factorization.

9816394812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720 (or 1711 counting only the distinct ones).

The product of its digits is 746496, while the sum is 51.

The square root of 9816394812 is about 99077.7210678566. The cubic root of 9816394812 is about 2141.1676461842.

The spelling of 9816394812 in words is "nine billion, eight hundred sixteen million, three hundred ninety-four thousand, eight hundred twelve".