6541439818056 has 256 divisors, whose sum is σ = 20062346250240. Its totient is φ = 1748961392640.

The previous prime is 6541439818031. The next prime is 6541439818087. The reversal of 6541439818056 is 6508189341456.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 112612636 + ... + 112670708.

It is an arithmetic number, because the mean of its divisors is an integer number (78368540040).

Almost surely, 2^{6541439818056} is an apocalyptic number.

6541439818056 is a gapful number since it is divisible by the number (66) 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 6541439818056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10031173125120).

6541439818056 is an abundant number, since it is smaller than the sum of its proper divisors (13520906432184).

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

6541439818056 is a wasteful number, since it uses less digits than its factorization.

6541439818056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59556 (or 59552 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 60.

The spelling of 6541439818056 in words is "six trillion, five hundred forty-one billion, four hundred thirty-nine million, eight hundred eighteen thousand, fifty-six".