50646643109 has 2 divisors, whose sum is σ = 50646643110. Its totient is φ = 50646643108.

The previous prime is 50646642989. The next prime is 50646643127. The reversal of 50646643109 is 90134664605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50492337025 + 154306084 = 224705^2 + 12422^2 .

It is a cyclic number.

It is not a de Polignac number, because 50646643109 - 2¹² = 50646639013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50646643109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50646643129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25323321554 + 25323321555.

It is an arithmetic number, because the mean of its divisors is an integer number (25323321555).

Almost surely, 2^50646643109 is an apocalyptic number.

It is an amenable number.

50646643109 is a deficient number, since it is larger than the sum of its proper divisors (1).

50646643109 is an equidigital number, since it uses as much as digits as its factorization.

50646643109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 50646643109 in words is "fifty billion, six hundred forty-six million, six hundred forty-three thousand, one hundred nine".