50505504991 has 2 divisors, whose sum is σ = 50505504992. Its totient is φ = 50505504990.

The previous prime is 50505504989. The next prime is 50505504997. The reversal of 50505504991 is 19940550505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50505504991 - 2¹ = 50505504989 is a prime.

Together with 50505504989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50505504997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25252752495 + 25252752496.

It is an arithmetic number, because the mean of its divisors is an integer number (25252752496).

Almost surely, 2^50505504991 is an apocalyptic number.

50505504991 is a deficient number, since it is larger than the sum of its proper divisors (1).

50505504991 is an equidigital number, since it uses as much as digits as its factorization.

50505504991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 202500, while the sum is 43.

The spelling of 50505504991 in words is "fifty billion, five hundred five million, five hundred four thousand, nine hundred ninety-one".