50661563 has 2 divisors, whose sum is σ = 50661564. Its totient is φ = 50661562.

The previous prime is 50661539. The next prime is 50661593. The reversal of 50661563 is 36516605.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50661563 - 2⁸ = 50661307 is a prime.

It is not a weakly prime, because it can be changed into another prime (50661503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25330781 + 25330782.

It is an arithmetic number, because the mean of its divisors is an integer number (25330782).

Almost surely, 2^50661563 is an apocalyptic number.

50661563 is a deficient number, since it is larger than the sum of its proper divisors (1).

50661563 is an equidigital number, since it uses as much as digits as its factorization.

50661563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 50661563 is about 7117.6936573584. The cubic root of 50661563 is about 370.0208485939.

The spelling of 50661563 in words is "fifty million, six hundred sixty-one thousand, five hundred sixty-three".