6561116165118 has 32 divisors (see below), whose sum is σ = 13254728007456. Its totient is φ = 2165064624128.

The previous prime is 6561116165117. The next prime is 6561116165137. The reversal of 6561116165118 is 8115616111656.

It is a super-3 number, since 3×6561116165118³ (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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13322355 + ... + 13806062.

It is an arithmetic number, because the mean of its divisors is an integer number (414210250233).

Almost surely, 2^{6561116165118} is an apocalyptic number.

6561116165118 is an abundant number, since it is smaller than the sum of its proper divisors (6693611842338).

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

6561116165118 is a wasteful number, since it uses less digits than its factorization.

6561116165118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27128828.

The product of its digits is 259200, while the sum is 48.

The spelling of 6561116165118 in words is "six trillion, five hundred sixty-one billion, one hundred sixteen million, one hundred sixty-five thousand, one hundred eighteen".