504505433561 has 2 divisors, whose sum is σ = 504505433562. Its totient is φ = 504505433560.

The previous prime is 504505433491. The next prime is 504505433563. The reversal of 504505433561 is 165334505405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259238814025 + 245266619536 = 509155^2 + 495244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-504505433561 is a prime.

Together with 504505433563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (504505433563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252252716780 + 252252716781.

It is an arithmetic number, because the mean of its divisors is an integer number (252252716781).

Almost surely, 2^504505433561 is an apocalyptic number.

It is an amenable number.

504505433561 is a deficient number, since it is larger than the sum of its proper divisors (1).

504505433561 is an equidigital number, since it uses as much as digits as its factorization.

504505433561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540000, while the sum is 41.

Adding to 504505433561 its reverse (165334505405), we get a palindrome (669839938966).

The spelling of 504505433561 in words is "five hundred four billion, five hundred five million, four hundred thirty-three thousand, five hundred sixty-one".