16505550049 has 2 divisors, whose sum is σ = 16505550050. Its totient is φ = 16505550048.

The previous prime is 16505550041. The next prime is 16505550151. The reversal of 16505550049 is 94005550561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10128409600 + 6377140449 = 100640^2 + 79857^2 .

It is a cyclic number.

It is not a de Polignac number, because 16505550049 - 2³ = 16505550041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16505549993 and 16505550020.

It is not a weakly prime, because it can be changed into another prime (16505550041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252775024 + 8252775025.

It is an arithmetic number, because the mean of its divisors is an integer number (8252775025).

Almost surely, 2^16505550049 is an apocalyptic number.

It is an amenable number.

16505550049 is a deficient number, since it is larger than the sum of its proper divisors (1).

16505550049 is an equidigital number, since it uses as much as digits as its factorization.

16505550049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 16505550049 in words is "sixteen billion, five hundred five million, five hundred fifty thousand, forty-nine".