6561116704 has 48 divisors (see below), whose sum is σ = 13063196160. Its totient is φ = 3243686400.

The previous prime is 6561116701. The next prime is 6561116711. The reversal of 6561116704 is 4076111656.

It is a super-3 number, since 3×6561116704³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (6561116701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1074492 + ... + 1080580.

It is an arithmetic number, because the mean of its divisors is an integer number (272149920).

Almost surely, 2^6561116704 is an apocalyptic number.

It is an amenable number.

6561116704 is a deficient number, since it is larger than the sum of its proper divisors (6502079456).

6561116704 is a wasteful number, since it uses less digits than its factorization.

6561116704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6473 (or 6465 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 6561116704 is about 81000.7203918582. The cubic root of 6561116704 is about 1872.0865405484.

The spelling of 6561116704 in words is "six billion, five hundred sixty-one million, one hundred sixteen thousand, seven hundred four".