505560560761 has 2 divisors, whose sum is σ = 505560560762. Its totient is φ = 505560560760.

The previous prime is 505560560753. The next prime is 505560560779. The reversal of 505560560761 is 167065065505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 431739670761 + 73820890000 = 657069^2 + 271700^2 .

It is a cyclic number.

It is not a de Polignac number, because 505560560761 - 2³ = 505560560753 is a prime.

It is not a weakly prime, because it can be changed into another prime (505560560711) 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, 252780280380 + 252780280381.

It is an arithmetic number, because the mean of its divisors is an integer number (252780280381).

Almost surely, 2^505560560761 is an apocalyptic number.

It is an amenable number.

505560560761 is a deficient number, since it is larger than the sum of its proper divisors (1).

505560560761 is an equidigital number, since it uses as much as digits as its factorization.

505560560761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 945000, while the sum is 46.

The spelling of 505560560761 in words is "five hundred five billion, five hundred sixty million, five hundred sixty thousand, seven hundred sixty-one".