505045499891 has 8 divisors (see below), whose sum is σ = 505387603968. Its totient is φ = 504703485000.

The previous prime is 505045499879. The next prime is 505045499899. The reversal of 505045499891 is 198994540505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505045499891 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 505045499891.

It is not an unprimeable number, because it can be changed into a prime (505045499899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14285126 + ... + 14320436.

It is an arithmetic number, because the mean of its divisors is an integer number (63173450496).

Almost surely, 2^505045499891 is an apocalyptic number.

505045499891 is a deficient number, since it is larger than the sum of its proper divisors (342104077).

505045499891 is a wasteful number, since it uses less digits than its factorization.

505045499891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44593.

The product of its (nonzero) digits is 11664000, while the sum is 59.

The spelling of 505045499891 in words is "five hundred five billion, forty-five million, four hundred ninety-nine thousand, eight hundred ninety-one".