50890956328781 has 2 divisors, whose sum is σ = 50890956328782. Its totient is φ = 50890956328780.

The previous prime is 50890956328777. The next prime is 50890956328801. The reversal of 50890956328781 is 18782365909805.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38126413766281 + 12764542562500 = 6174659^2 + 3572750^2 .

It is a cyclic number.

It is not a de Polignac number, because 50890956328781 - 2² = 50890956328777 is a prime.

It is a super-2 number, since 2×50890956328781² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50890956328721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25445478164390 + 25445478164391.

It is an arithmetic number, because the mean of its divisors is an integer number (25445478164391).

Almost surely, 2^{50890956328781} is an apocalyptic number.

It is an amenable number.

50890956328781 is a deficient number, since it is larger than the sum of its proper divisors (1).

50890956328781 is an equidigital number, since it uses as much as digits as its factorization.

50890956328781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 261273600, while the sum is 71.

The spelling of 50890956328781 in words is "fifty trillion, eight hundred ninety billion, nine hundred fifty-six million, three hundred twenty-eight thousand, seven hundred eighty-one".