505005459591 has 4 divisors (see below), whose sum is σ = 673340612792. Its totient is φ = 336670306392.

The previous prime is 505005459589. The next prime is 505005459613. The reversal of 505005459591 is 195954500505.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 505005459591 - 2¹ = 505005459589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505005459591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505005452591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84167576596 + ... + 84167576601.

It is an arithmetic number, because the mean of its divisors is an integer number (168335153198).

Almost surely, 2^505005459591 is an apocalyptic number.

505005459591 is a deficient number, since it is larger than the sum of its proper divisors (168335153201).

505005459591 is a wasteful number, since it uses less digits than its factorization.

505005459591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168335153200.

The product of its (nonzero) digits is 1012500, while the sum is 48.

The spelling of 505005459591 in words is "five hundred five billion, five million, four hundred fifty-nine thousand, five hundred ninety-one".