50610005581 has 2 divisors, whose sum is σ = 50610005582. Its totient is φ = 50610005580.

The previous prime is 50610005573. The next prime is 50610005609. The reversal of 50610005581 is 18550001605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45564744681 + 5045260900 = 213459^2 + 71030^2 .

It is a cyclic number.

It is not a de Polignac number, because 50610005581 - 2³ = 50610005573 is a prime.

It is a super-2 number, since 2×50610005581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50610005981) 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, 25305002790 + 25305002791.

It is an arithmetic number, because the mean of its divisors is an integer number (25305002791).

Almost surely, 2^50610005581 is an apocalyptic number.

It is an amenable number.

50610005581 is a deficient number, since it is larger than the sum of its proper divisors (1).

50610005581 is an equidigital number, since it uses as much as digits as its factorization.

50610005581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 31.

The spelling of 50610005581 in words is "fifty billion, six hundred ten million, five thousand, five hundred eighty-one".