50278778873 has 2 divisors, whose sum is σ = 50278778874. Its totient is φ = 50278778872.

The previous prime is 50278778863. The next prime is 50278778903. The reversal of 50278778873 is 37887787205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30598055929 + 19680722944 = 174923^2 + 140288^2 .

It is a cyclic number.

It is not a de Polignac number, because 50278778873 - 2¹⁶ = 50278713337 is a prime.

It is not a weakly prime, because it can be changed into another prime (50278778833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25139389436 + 25139389437.

It is an arithmetic number, because the mean of its divisors is an integer number (25139389437).

Almost surely, 2^50278778873 is an apocalyptic number.

It is an amenable number.

50278778873 is a deficient number, since it is larger than the sum of its proper divisors (1).

50278778873 is an equidigital number, since it uses as much as digits as its factorization.

50278778873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36879360, while the sum is 62.

The spelling of 50278778873 in words is "fifty billion, two hundred seventy-eight million, seven hundred seventy-eight thousand, eight hundred seventy-three".