50871767257 has 2 divisors, whose sum is σ = 50871767258. Its totient is φ = 50871767256.

The previous prime is 50871767207. The next prime is 50871767267. The reversal of 50871767257 is 75276717805.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37355612176 + 13516155081 = 193276^2 + 116259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50871767257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50871767198 and 50871767207.

It is not a weakly prime, because it can be changed into another prime (50871767207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25435883628 + 25435883629.

It is an arithmetic number, because the mean of its divisors is an integer number (25435883629).

Almost surely, 2^50871767257 is an apocalyptic number.

It is an amenable number.

50871767257 is a deficient number, since it is larger than the sum of its proper divisors (1).

50871767257 is an equidigital number, since it uses as much as digits as its factorization.

50871767257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5762400, while the sum is 55.

The spelling of 50871767257 in words is "fifty billion, eight hundred seventy-one million, seven hundred sixty-seven thousand, two hundred fifty-seven".