505545055657 has 2 divisors, whose sum is σ = 505545055658. Its totient is φ = 505545055656.

The previous prime is 505545055649. The next prime is 505545055711. The reversal of 505545055657 is 756550545505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 329907789376 + 175637266281 = 574376^2 + 419091^2 .

It is a cyclic number.

It is not a de Polignac number, because 505545055657 - 2³ = 505545055649 is a prime.

It is not a weakly prime, because it can be changed into another prime (505545055357) 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, 252772527828 + 252772527829.

It is an arithmetic number, because the mean of its divisors is an integer number (252772527829).

Almost surely, 2^505545055657 is an apocalyptic number.

It is an amenable number.

505545055657 is a deficient number, since it is larger than the sum of its proper divisors (1).

505545055657 is an equidigital number, since it uses as much as digits as its factorization.

505545055657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13125000, while the sum is 52.

The spelling of 505545055657 in words is "five hundred five billion, five hundred forty-five million, fifty-five thousand, six hundred fifty-seven".