505510050091 has 2 divisors, whose sum is σ = 505510050092. Its totient is φ = 505510050090.

The previous prime is 505510050077. The next prime is 505510050161. The reversal of 505510050091 is 190050015505.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505510050091 is a prime.

It is not a weakly prime, because it can be changed into another prime (505510050191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252755025045 + 252755025046.

It is an arithmetic number, because the mean of its divisors is an integer number (252755025046).

Almost surely, 2^505510050091 is an apocalyptic number.

505510050091 is a deficient number, since it is larger than the sum of its proper divisors (1).

505510050091 is an equidigital number, since it uses as much as digits as its factorization.

505510050091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5625, while the sum is 31.

Adding to 505510050091 its reverse (190050015505), we get a palindrome (695560065596).

The spelling of 505510050091 in words is "five hundred five billion, five hundred ten million, fifty thousand, ninety-one".