505410205242557 has 2 divisors, whose sum is σ = 505410205242558. Its totient is φ = 505410205242556.

The previous prime is 505410205242529. The next prime is 505410205242583. The reversal of 505410205242557 is 755242502014505.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494609326754596 + 10800878487961 = 22239814^2 + 3286469^2 .

It is a cyclic number.

It is not a de Polignac number, because 505410205242557 - 2¹² = 505410205238461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505410705242557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252705102621278 + 252705102621279.

It is an arithmetic number, because the mean of its divisors is an integer number (252705102621279).

Almost surely, 2^{505410205242557} is an apocalyptic number.

It is an amenable number.

505410205242557 is a deficient number, since it is larger than the sum of its proper divisors (1).

505410205242557 is an equidigital number, since it uses as much as digits as its factorization.

505410205242557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800000, while the sum is 47.

The spelling of 505410205242557 in words is "five hundred five trillion, four hundred ten billion, two hundred five million, two hundred forty-two thousand, five hundred fifty-seven".