8383940545640 has 192 divisors, whose sum is σ = 21351419510400. Its totient is φ = 2958457582080.

The previous prime is 8383940545621. The next prime is 8383940545681. The reversal of 8383940545640 is 465450493838.

It is a self number, because there is not a number n which added to its sum of digits gives 8383940545640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67809557 + ... + 67933083.

It is an arithmetic number, because the mean of its divisors is an integer number (111205309950).

Almost surely, 2^{8383940545640} 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 8383940545640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10675709755200).

8383940545640 is an abundant number, since it is smaller than the sum of its proper divisors (12967478964760).

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

8383940545640 is a wasteful number, since it uses less digits than its factorization.

8383940545640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123976 (or 123961 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 59.

The spelling of 8383940545640 in words is "eight trillion, three hundred eighty-three billion, nine hundred forty million, five hundred forty-five thousand, six hundred forty".