6523965557 has 2 divisors, whose sum is σ = 6523965558. Its totient is φ = 6523965556.

The previous prime is 6523965527. The next prime is 6523965559. The reversal of 6523965557 is 7555693256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6410564356 + 113401201 = 80066^2 + 10649^2 .

It is a cyclic number.

It is not a de Polignac number, because 6523965557 - 2⁶ = 6523965493 is a prime.

Together with 6523965559, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6523965499 and 6523965508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6523965559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3261982778 + 3261982779.

It is an arithmetic number, because the mean of its divisors is an integer number (3261982779).

Almost surely, 2^6523965557 is an apocalyptic number.

It is an amenable number.

6523965557 is a deficient number, since it is larger than the sum of its proper divisors (1).

6523965557 is an equidigital number, since it uses as much as digits as its factorization.

6523965557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8505000, while the sum is 53.

The square root of 6523965557 is about 80771.0688117967. The cubic root of 6523965557 is about 1868.5463988472.

The spelling of 6523965557 in words is "six billion, five hundred twenty-three million, nine hundred sixty-five thousand, five hundred fifty-seven".