505406322529 has 6 divisors (see below), whose sum is σ = 522235670370. Its totient is φ = 489102891840.

The previous prime is 505406322527. The next prime is 505406322541. The reversal of 505406322529 is 925223604505.

It can be written as a sum of positive squares in only one way, i.e., 272525761600 + 232880560929 = 522040^2 + 482577^2 .

It is not a de Polignac number, because 505406322529 - 2¹ = 505406322527 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505406322521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 262957584 + ... + 262959505.

It is an arithmetic number, because the mean of its divisors is an integer number (87039278395).

Almost surely, 2^505406322529 is an apocalyptic number.

It is an amenable number.

505406322529 is a deficient number, since it is larger than the sum of its proper divisors (16829347841).

505406322529 is an equidigital number, since it uses as much as digits as its factorization.

505406322529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525917151 (or 525917120 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 505406322529 in words is "five hundred five billion, four hundred six million, three hundred twenty-two thousand, five hundred twenty-nine".