6509140979069 has 2 divisors, whose sum is σ = 6509140979070. Its totient is φ = 6509140979068.

The previous prime is 6509140979039. The next prime is 6509140979071. The reversal of 6509140979069 is 9609790419056.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4686627479044 + 1822513500025 = 2164862^2 + 1350005^2 .

It is a cyclic number.

It is not a de Polignac number, because 6509140979069 - 2²⁰ = 6509139930493 is a prime.

It is a super-2 number, since 2×6509140979069² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 6509140979071, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6509140978996 and 6509140979014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6509140979039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3254570489534 + 3254570489535.

It is an arithmetic number, because the mean of its divisors is an integer number (3254570489535).

Almost surely, 2^{6509140979069} is an apocalyptic number.

It is an amenable number.

6509140979069 is a deficient number, since it is larger than the sum of its proper divisors (1).

6509140979069 is an equidigital number, since it uses as much as digits as its factorization.

6509140979069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33067440, while the sum is 65.

The spelling of 6509140979069 in words is "six trillion, five hundred nine billion, one hundred forty million, nine hundred seventy-nine thousand, sixty-nine".