6542865841 has 2 divisors, whose sum is σ = 6542865842. Its totient is φ = 6542865840.

The previous prime is 6542865811. The next prime is 6542865863. The reversal of 6542865841 is 1485682456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6502809600 + 40056241 = 80640^2 + 6329^2 .

It is a cyclic number.

It is not a de Polignac number, because 6542865841 - 2⁷ = 6542865713 is a prime.

It is not a weakly prime, because it can be changed into another prime (6542865811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271432920 + 3271432921.

It is an arithmetic number, because the mean of its divisors is an integer number (3271432921).

Almost surely, 2^6542865841 is an apocalyptic number.

It is an amenable number.

6542865841 is a deficient number, since it is larger than the sum of its proper divisors (1).

6542865841 is an equidigital number, since it uses as much as digits as its factorization.

6542865841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1843200, while the sum is 49.

The square root of 6542865841 is about 80887.9832917103. The cubic root of 6542865841 is about 1870.3490860778.

The spelling of 6542865841 in words is "six billion, five hundred forty-two million, eight hundred sixty-five thousand, eight hundred forty-one".