6516511616 has 32 divisors (see below), whose sum is σ = 13546558800. Its totient is φ = 3116591104.

The previous prime is 6516511579. The next prime is 6516511619. The reversal of 6516511616 is 6161156156.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 6516511616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6516511619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1103801 + ... + 1109688.

Almost surely, 2^6516511616 is an apocalyptic number.

It is an amenable number.

6516511616 is an abundant number, since it is smaller than the sum of its proper divisors (7030047184).

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

6516511616 is a wasteful number, since it uses less digits than its factorization.

6516511616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213526 (or 2213514 counting only the distinct ones).

The product of its digits is 32400, while the sum is 38.

The square root of 6516511616 is about 80724.9132300556. The cubic root of 6516511616 is about 1867.8344932666.

The spelling of 6516511616 in words is "six billion, five hundred sixteen million, five hundred eleven thousand, six hundred sixteen".