505408845671 has 2 divisors, whose sum is σ = 505408845672. Its totient is φ = 505408845670.

The previous prime is 505408845637. The next prime is 505408845713. The reversal of 505408845671 is 176548804505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505408845671 - 2⁶ = 505408845607 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505408845631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252704422835 + 252704422836.

It is an arithmetic number, because the mean of its divisors is an integer number (252704422836).

Almost surely, 2^505408845671 is an apocalyptic number.

505408845671 is a deficient number, since it is larger than the sum of its proper divisors (1).

505408845671 is an equidigital number, since it uses as much as digits as its factorization.

505408845671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376000, while the sum is 53.

The spelling of 505408845671 in words is "five hundred five billion, four hundred eight million, eight hundred forty-five thousand, six hundred seventy-one".