50561056109 has 2 divisors, whose sum is σ = 50561056110. Its totient is φ = 50561056108.

The previous prime is 50561056093. The next prime is 50561056159. The reversal of 50561056109 is 90165016505.

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., 29360822500 + 21200233609 = 171350^2 + 145603^2 .

It is a cyclic number.

It is not a de Polignac number, because 50561056109 - 2⁴ = 50561056093 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50561056159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25280528054 + 25280528055.

It is an arithmetic number, because the mean of its divisors is an integer number (25280528055).

Almost surely, 2^50561056109 is an apocalyptic number.

It is an amenable number.

50561056109 is a deficient number, since it is larger than the sum of its proper divisors (1).

50561056109 is an equidigital number, since it uses as much as digits as its factorization.

50561056109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40500, while the sum is 38.

The spelling of 50561056109 in words is "fifty billion, five hundred sixty-one million, fifty-six thousand, one hundred nine".