505527805553 has 2 divisors, whose sum is σ = 505527805554. Its totient is φ = 505527805552.

The previous prime is 505527805511. The next prime is 505527805583. The reversal of 505527805553 is 355508725505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364758018304 + 140769787249 = 603952^2 + 375193^2 .

It is a cyclic number.

It is not a de Polignac number, because 505527805553 - 2¹⁶ = 505527740017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (505527805583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252763902776 + 252763902777.

It is an arithmetic number, because the mean of its divisors is an integer number (252763902777).

Almost surely, 2^505527805553 is an apocalyptic number.

It is an amenable number.

505527805553 is a deficient number, since it is larger than the sum of its proper divisors (1).

505527805553 is an equidigital number, since it uses as much as digits as its factorization.

505527805553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5250000, while the sum is 50.

The spelling of 505527805553 in words is "five hundred five billion, five hundred twenty-seven million, eight hundred five thousand, five hundred fifty-three".