6541439818005 has 16 divisors (see below), whose sum is σ = 11629226343360. Its totient is φ = 3488767902864.

The previous prime is 6541439817967. The next prime is 6541439818007. The reversal of 6541439818005 is 5008189341456.

It is a happy number.

6541439818005 is a `hidden beast` number, since 6 + 54 + 1 + 439 + 81 + 80 + 0 + 5 = 666.

It is not a de Polignac number, because 6541439818005 - 2⁸ = 6541439817749 is a prime.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24227554747 + ... + 24227555016.

It is an arithmetic number, because the mean of its divisors is an integer number (726826646460).

Almost surely, 2^{6541439818005} is an apocalyptic number.

It is an amenable number.

6541439818005 is a deficient number, since it is larger than the sum of its proper divisors (5087786525355).

6541439818005 is a wasteful number, since it uses less digits than its factorization.

6541439818005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48455109777 (or 48455109771 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 6541439818005 in words is "six trillion, five hundred forty-one billion, four hundred thirty-nine million, eight hundred eighteen thousand, five".