6561510511116 has 36 divisors (see below), whose sum is σ = 16828557265016. Its totient is φ = 1988336518080.

The previous prime is 6561510511111. The next prime is 6561510511141. The reversal of 6561510511116 is 6111150151656.

It is not an unprimeable number, because it can be changed into a prime (6561510511111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2259471865 + ... + 2259474768.

Almost surely, 2^{6561510511116} is an apocalyptic number.

6561510511116 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6561510511116 is an abundant number, since it is smaller than the sum of its proper divisors (10267046753900).

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

6561510511116 is a wasteful number, since it uses less digits than its factorization.

6561510511116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4518946662 (or 4518946649 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 39.

The spelling of 6561510511116 in words is "six trillion, five hundred sixty-one billion, five hundred ten million, five hundred eleven thousand, one hundred sixteen".