6561116165100 has 108 divisors (see below), whose sum is σ = 22082842456584. Its totient is φ = 1499683691520.

The previous prime is 6561116165033. The next prime is 6561116165101. The reversal of 6561116165100 is 15616111656.

It is a super-3 number, since 3×6561116165100³ (a number of 39 digits) contains 333 as substring.

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 35 ways as a sum of consecutive naturals, for example, 223152517 + ... + 223181916.

Almost surely, 2^{6561116165100} is an apocalyptic number.

6561116165100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6561116165100 is an abundant number, since it is smaller than the sum of its proper divisors (15521726291484).

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

6561116165100 is a wasteful number, since it uses less digits than its factorization.

6561116165100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446334464 (or 446334450 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 6561116165100 in words is "six trillion, five hundred sixty-one billion, one hundred sixteen million, one hundred sixty-five thousand, one hundred".