6516551165500 has 96 divisors (see below), whose sum is σ = 14347701688320. Its totient is φ = 2585466777600.

The previous prime is 6516551165401. The next prime is 6516551165521. The reversal of 6516551165500 is 55611556156.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 329491612 + ... + 329511388.

It is an arithmetic number, because the mean of its divisors is an integer number (149455225920).

Almost surely, 2^{6516551165500} 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 6516551165500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7173850844160).

6516551165500 is an abundant number, since it is smaller than the sum of its proper divisors (7831150522820).

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

6516551165500 is a wasteful number, since it uses less digits than its factorization.

6516551165500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25112 (or 25100 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 6516551165500 in words is "six trillion, five hundred sixteen billion, five hundred fifty-one million, one hundred sixty-five thousand, five hundred".