8340947778384 has 640 divisors, whose sum is σ = 27330890711040. Its totient is φ = 2416084070400.

The previous prime is 8340947778377. The next prime is 8340947778389. The reversal of 8340947778384 is 4838777490438.

8340947778384 is a `hidden beast` number, since 8 + 3 + 4 + 0 + 9 + 477 + 78 + 3 + 84 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8340947778389) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8590059019 + ... + 8590059989.

It is an arithmetic number, because the mean of its divisors is an integer number (42704516736).

Almost surely, 2^{8340947778384} 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 8340947778384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13665445355520).

8340947778384 is an abundant number, since it is smaller than the sum of its proper divisors (18989942932656).

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

8340947778384 is a wasteful number, since it uses less digits than its factorization.

8340947778384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008 (or 1996 counting only the distinct ones).

The product of its (nonzero) digits is 910393344, while the sum is 72.

The spelling of 8340947778384 in words is "eight trillion, three hundred forty billion, nine hundred forty-seven million, seven hundred seventy-eight thousand, three hundred eighty-four".