505592216491 has 4 divisors (see below), whose sum is σ = 505810995184. Its totient is φ = 505373437800.

The previous prime is 505592216471. The next prime is 505592216531. The reversal of 505592216491 is 194612295505.

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

It is a cyclic number.

It is not a de Polignac number, because 505592216491 - 2²³ = 505583827883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505592216471) 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, 109385880 + ... + 109390501.

It is an arithmetic number, because the mean of its divisors is an integer number (126452748796).

Almost surely, 2^505592216491 is an apocalyptic number.

505592216491 is a deficient number, since it is larger than the sum of its proper divisors (218778693).

505592216491 is a wasteful number, since it uses less digits than its factorization.

505592216491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218778692.

The product of its (nonzero) digits is 972000, while the sum is 49.

The spelling of 505592216491 in words is "five hundred five billion, five hundred ninety-two million, two hundred sixteen thousand, four hundred ninety-one".