6715506125509 has 2 divisors, whose sum is σ = 6715506125510. Its totient is φ = 6715506125508.

The previous prime is 6715506125501. The next prime is 6715506125617. The reversal of 6715506125509 is 9055216055176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6043130725284 + 672375400225 = 2458278^2 + 819985^2 .

It is a cyclic number.

It is not a de Polignac number, because 6715506125509 - 2³ = 6715506125501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6715506125501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3357753062754 + 3357753062755.

It is an arithmetic number, because the mean of its divisors is an integer number (3357753062755).

Almost surely, 2^{6715506125509} is an apocalyptic number.

It is an amenable number.

6715506125509 is a deficient number, since it is larger than the sum of its proper divisors (1).

6715506125509 is an equidigital number, since it uses as much as digits as its factorization.

6715506125509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835000, while the sum is 52.

The spelling of 6715506125509 in words is "six trillion, seven hundred fifteen billion, five hundred six million, one hundred twenty-five thousand, five hundred nine".