6541439818008 has 96 divisors (see below), whose sum is σ = 16706638809360. Its totient is φ = 2133828856320.

The previous prime is 6541439818007. The next prime is 6541439818013. The reversal of 6541439818008 is 8008189341456.

It is a super-2 number, since 2×6541439818008² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6541439818007) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 56758810 + ... + 56873942.

Almost surely, 2^{6541439818008} 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 6541439818008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8353319404680).

6541439818008 is an abundant number, since it is smaller than the sum of its proper divisors (10165198991352).

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

6541439818008 is a wasteful number, since it uses less digits than its factorization.

6541439818008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115597 (or 115396 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 57.

The spelling of 6541439818008 in words is "six trillion, five hundred forty-one billion, four hundred thirty-nine million, eight hundred eighteen thousand, eight".