50550549998909 has 2 divisors, whose sum is σ = 50550549998910. Its totient is φ = 50550549998908.

The previous prime is 50550549998891. The next prime is 50550549998941. The reversal of 50550549998909 is 90989994505505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50550365174884 + 184824025 = 7109878^2 + 13595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50550549998909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50550549998909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50550549998969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25275274999454 + 25275274999455.

It is an arithmetic number, because the mean of its divisors is an integer number (25275274999455).

Almost surely, 2^{50550549998909} is an apocalyptic number.

It is an amenable number.

50550549998909 is a deficient number, since it is larger than the sum of its proper divisors (1).

50550549998909 is an equidigital number, since it uses as much as digits as its factorization.

50550549998909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1180980000, while the sum is 77.

The spelling of 50550549998909 in words is "fifty trillion, five hundred fifty billion, five hundred forty-nine million, nine hundred ninety-eight thousand, nine hundred nine".