6543112761 has 6 divisors (see below), whose sum is σ = 9451162890. Its totient is φ = 4362075168.

The previous prime is 6543112729. The next prime is 6543112817. The reversal of 6543112761 is 1672113456.

It can be written as a sum of positive squares in only one way, i.e., 5404455225 + 1138657536 = 73515^2 + 33744^2 .

It is not a de Polignac number, because 6543112761 - 2⁵ = 6543112729 is a prime.

It is a super-2 number, since 2×6543112761² = 85624649206322086242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6543112561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 363506256 + ... + 363506273.

It is an arithmetic number, because the mean of its divisors is an integer number (1575193815).

Almost surely, 2^6543112761 is an apocalyptic number.

It is an amenable number.

6543112761 is a deficient number, since it is larger than the sum of its proper divisors (2908050129).

6543112761 is a wasteful number, since it uses less digits than its factorization.

6543112761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727012535 (or 727012532 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 6543112761 is about 80889.5095856070. The cubic root of 6543112761 is about 1870.3726140342.

The spelling of 6543112761 in words is "six billion, five hundred forty-three million, one hundred twelve thousand, seven hundred sixty-one".