50605317781 has 2 divisors, whose sum is σ = 50605317782. Its totient is φ = 50605317780.

The previous prime is 50605317773. The next prime is 50605317793. The reversal of 50605317781 is 18771350605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27723915025 + 22881402756 = 166505^2 + 151266^2 .

It is a cyclic number.

It is not a de Polignac number, because 50605317781 - 2³ = 50605317773 is a prime.

It is a super-2 number, since 2×50605317781² (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 (50605317731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25302658890 + 25302658891.

It is an arithmetic number, because the mean of its divisors is an integer number (25302658891).

Almost surely, 2^50605317781 is an apocalyptic number.

It is an amenable number.

50605317781 is a deficient number, since it is larger than the sum of its proper divisors (1).

50605317781 is an equidigital number, since it uses as much as digits as its factorization.

50605317781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 50605317781 in words is "fifty billion, six hundred five million, three hundred seventeen thousand, seven hundred eighty-one".