505252780537 has 2 divisors, whose sum is σ = 505252780538. Its totient is φ = 505252780536.

The previous prime is 505252780499. The next prime is 505252780541. The reversal of 505252780537 is 735087252505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432574551616 + 72678228921 = 657704^2 + 269589^2 .

It is a cyclic number.

It is not a de Polignac number, because 505252780537 - 2²³ = 505244391929 is a prime.

It is not a weakly prime, because it can be changed into another prime (505252780237) 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, 252626390268 + 252626390269.

It is an arithmetic number, because the mean of its divisors is an integer number (252626390269).

Almost surely, 2^505252780537 is an apocalyptic number.

It is an amenable number.

505252780537 is a deficient number, since it is larger than the sum of its proper divisors (1).

505252780537 is an equidigital number, since it uses as much as digits as its factorization.

505252780537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2940000, while the sum is 49.

The spelling of 505252780537 in words is "five hundred five billion, two hundred fifty-two million, seven hundred eighty thousand, five hundred thirty-seven".