505454321010217 has 2 divisors, whose sum is σ = 505454321010218. Its totient is φ = 505454321010216.

The previous prime is 505454321010181. The next prime is 505454321010293. The reversal of 505454321010217 is 712010123454505.

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., 386208335969856 + 119245985040361 = 19652184^2 + 10919981^2 .

It is a cyclic number.

It is not a de Polignac number, because 505454321010217 - 2³¹ = 505452173526569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505454321010217.

It is not a weakly prime, because it can be changed into another prime (505454321010517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252727160505108 + 252727160505109.

It is an arithmetic number, because the mean of its divisors is an integer number (252727160505109).

Almost surely, 2^{505454321010217} is an apocalyptic number.

It is an amenable number.

505454321010217 is a deficient number, since it is larger than the sum of its proper divisors (1).

505454321010217 is an equidigital number, since it uses as much as digits as its factorization.

505454321010217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 505454321010217 in words is "five hundred five trillion, four hundred fifty-four billion, three hundred twenty-one million, ten thousand, two hundred seventeen".