6539640171696 has 210 divisors, whose sum is σ = 20049624861300. Its totient is φ = 2065148198208.

The previous prime is 6539640171667. The next prime is 6539640171697. The reversal of 6539640171696 is 6961710469356.

6539640171696 is a `hidden beast` number, since 6 + 53 + 96 + 401 + 7 + 1 + 6 + 96 = 666.

It is not an unprimeable number, because it can be changed into a prime (6539640171697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 3434155 + ... + 4987253.

Almost surely, 2^{6539640171696} 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 6539640171696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10024812430650).

6539640171696 is an abundant number, since it is smaller than the sum of its proper divisors (13509984689604).

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

6539640171696 is a wasteful number, since it uses less digits than its factorization.

6539640171696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553163 (or 1553123 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 63.

The spelling of 6539640171696 in words is "six trillion, five hundred thirty-nine billion, six hundred forty million, one hundred seventy-one thousand, six hundred ninety-six".