505555003813 has 2 divisors, whose sum is σ = 505555003814. Its totient is φ = 505555003812.

The previous prime is 505555003777. The next prime is 505555003819. The reversal of 505555003813 is 318300555505.

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., 504715047489 + 839956324 = 710433^2 + 28982^2 .

It is a cyclic number.

It is not a de Polignac number, because 505555003813 - 2³³ = 496965069221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505555003819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252777501906 + 252777501907.

It is an arithmetic number, because the mean of its divisors is an integer number (252777501907).

Almost surely, 2^505555003813 is an apocalyptic number.

It is an amenable number.

505555003813 is a deficient number, since it is larger than the sum of its proper divisors (1).

505555003813 is an equidigital number, since it uses as much as digits as its factorization.

505555003813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225000, while the sum is 40.

The spelling of 505555003813 in words is "five hundred five billion, five hundred fifty-five million, three thousand, eight hundred thirteen".