50513216909 has 2 divisors, whose sum is σ = 50513216910. Its totient is φ = 50513216908.

The previous prime is 50513216899. The next prime is 50513216933. The reversal of 50513216909 is 90961231505.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48668772100 + 1844444809 = 220610^2 + 42947^2 .

It is a cyclic number.

It is not a de Polignac number, because 50513216909 - 2³² = 46218249613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50513216969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25256608454 + 25256608455.

It is an arithmetic number, because the mean of its divisors is an integer number (25256608455).

Almost surely, 2^50513216909 is an apocalyptic number.

It is an amenable number.

50513216909 is a deficient number, since it is larger than the sum of its proper divisors (1).

50513216909 is an equidigital number, since it uses as much as digits as its factorization.

50513216909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 41.

The spelling of 50513216909 in words is "fifty billion, five hundred thirteen million, two hundred sixteen thousand, nine hundred nine".