50989944991 has 2 divisors, whose sum is σ = 50989944992. Its totient is φ = 50989944990.

The previous prime is 50989944989. The next prime is 50989945001. The reversal of 50989944991 is 19944998905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50989944991 - 2¹ = 50989944989 is a prime.

Together with 50989944989, 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 (50989944911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25494972495 + 25494972496.

It is an arithmetic number, because the mean of its divisors is an integer number (25494972496).

Almost surely, 2^50989944991 is an apocalyptic number.

50989944991 is a deficient number, since it is larger than the sum of its proper divisors (1).

50989944991 is an equidigital number, since it uses as much as digits as its factorization.

50989944991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37791360, while the sum is 67.

The spelling of 50989944991 in words is "fifty billion, nine hundred eighty-nine million, nine hundred forty-four thousand, nine hundred ninety-one".