6561116165116 has 24 divisors (see below), whose sum is σ = 11883379641840. Its totient is φ = 3165969542400.

The previous prime is 6561116165101. The next prime is 6561116165117. The reversal of 6561116165116 is 6115616111656.

It is a happy number.

It is a super-3 number, since 3×6561116165116³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561116165117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12836170 + ... + 13337521.

It is an arithmetic number, because the mean of its divisors is an integer number (495140818410).

Almost surely, 2^{6561116165116} is an apocalyptic number.

It is an amenable number.

6561116165116 is a deficient number, since it is larger than the sum of its proper divisors (5322263476724).

6561116165116 is a wasteful number, since it uses less digits than its factorization.

6561116165116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26175885 (or 26175883 counting only the distinct ones).

The product of its digits is 194400, while the sum is 46.

The spelling of 6561116165116 in words is "six trillion, five hundred sixty-one billion, one hundred sixteen million, one hundred sixty-five thousand, one hundred sixteen".