50005550500561 has 2 divisors, whose sum is σ = 50005550500562. Its totient is φ = 50005550500560.

The previous prime is 50005550500517. The next prime is 50005550500643. The reversal of 50005550500561 is 16500505550005.

50005550500561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47242857742336 + 2762692758225 = 6873344^2 + 1662135^2 .

It is a cyclic number.

It is not a de Polignac number, because 50005550500561 - 2⁹ = 50005550500049 is a prime.

It is a super-2 number, since 2×50005550500561² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 50005550500561.

It is not a weakly prime, because it can be changed into another prime (50005550509561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25002775250280 + 25002775250281.

It is an arithmetic number, because the mean of its divisors is an integer number (25002775250281).

Almost surely, 2^{50005550500561} is an apocalyptic number.

It is an amenable number.

50005550500561 is a deficient number, since it is larger than the sum of its proper divisors (1).

50005550500561 is an equidigital number, since it uses as much as digits as its factorization.

50005550500561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93750, while the sum is 37.

The spelling of 50005550500561 in words is "fifty trillion, five billion, five hundred fifty million, five hundred thousand, five hundred sixty-one".