50205999917 has 2 divisors, whose sum is σ = 50205999918. Its totient is φ = 50205999916.

The previous prime is 50205999839. The next prime is 50206000001. The reversal of 50205999917 is 71999950205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47108966116 + 3097033801 = 217046^2 + 55651^2 .

It is a cyclic number.

It is not a de Polignac number, because 50205999917 - 2⁸ = 50205999661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50205999517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25102999958 + 25102999959.

It is an arithmetic number, because the mean of its divisors is an integer number (25102999959).

Almost surely, 2^50205999917 is an apocalyptic number.

It is an amenable number.

50205999917 is a deficient number, since it is larger than the sum of its proper divisors (1).

50205999917 is an equidigital number, since it uses as much as digits as its factorization.

50205999917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2296350, while the sum is 56.

The spelling of 50205999917 in words is "fifty billion, two hundred five million, nine hundred ninety-nine thousand, nine hundred seventeen".