50256678217 has 2 divisors, whose sum is σ = 50256678218. Its totient is φ = 50256678216.

The previous prime is 50256678203. The next prime is 50256678299. The reversal of 50256678217 is 71287665205.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44647267401 + 5609410816 = 211299^2 + 74896^2 .

It is a cyclic number.

It is not a de Polignac number, because 50256678217 - 2²⁷ = 50122460489 is a prime.

It is not a weakly prime, because it can be changed into another prime (50256678917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25128339108 + 25128339109.

It is an arithmetic number, because the mean of its divisors is an integer number (25128339109).

Almost surely, 2^50256678217 is an apocalyptic number.

It is an amenable number.

50256678217 is a deficient number, since it is larger than the sum of its proper divisors (1).

50256678217 is an equidigital number, since it uses as much as digits as its factorization.

50256678217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 50256678217 in words is "fifty billion, two hundred fifty-six million, six hundred seventy-eight thousand, two hundred seventeen".