505403311057 has 2 divisors, whose sum is σ = 505403311058. Its totient is φ = 505403311056.

The previous prime is 505403310989. The next prime is 505403311081. The reversal of 505403311057 is 750113304505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364285880721 + 141117430336 = 603561^2 + 375656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505403311057 is a prime.

It is not a weakly prime, because it can be changed into another prime (505403311097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252701655528 + 252701655529.

It is an arithmetic number, because the mean of its divisors is an integer number (252701655529).

Almost surely, 2^505403311057 is an apocalyptic number.

It is an amenable number.

505403311057 is a deficient number, since it is larger than the sum of its proper divisors (1).

505403311057 is an equidigital number, since it uses as much as digits as its factorization.

505403311057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31500, while the sum is 34.

The spelling of 505403311057 in words is "five hundred five billion, four hundred three million, three hundred eleven thousand, fifty-seven".