6561116165104 has 20 divisors (see below), whose sum is σ = 13459936839264. Its totient is φ = 3087584077568.

The previous prime is 6561116165101. The next prime is 6561116165117. The reversal of 6561116165104 is 4015616111656.

It is a super-3 number, since 3×6561116165104³ (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 (6561116165101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12060875032 + ... + 12060875575.

Almost surely, 2^{6561116165104} is an apocalyptic number.

It is an amenable number.

6561116165104 is an abundant number, since it is smaller than the sum of its proper divisors (6898820674160).

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

6561116165104 is a wasteful number, since it uses less digits than its factorization.

6561116165104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24121750632 (or 24121750626 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The spelling of 6561116165104 in words is "six trillion, five hundred sixty-one billion, one hundred sixteen million, one hundred sixty-five thousand, one hundred four".