501868594217 has 2 divisors, whose sum is σ = 501868594218. Its totient is φ = 501868594216.

The previous prime is 501868594189. The next prime is 501868594223. The reversal of 501868594217 is 712495868105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388202517481 + 113666076736 = 623059^2 + 337144^2 .

It is a cyclic number.

It is not a de Polignac number, because 501868594217 - 2¹² = 501868590121 is a prime.

It is a super-2 number, since 2×501868594217² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (501868594517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250934297108 + 250934297109.

It is an arithmetic number, because the mean of its divisors is an integer number (250934297109).

Almost surely, 2^501868594217 is an apocalyptic number.

It is an amenable number.

501868594217 is a deficient number, since it is larger than the sum of its proper divisors (1).

501868594217 is an equidigital number, since it uses as much as digits as its factorization.

501868594217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4838400, while the sum is 56.

The spelling of 501868594217 in words is "five hundred one billion, eight hundred sixty-eight million, five hundred ninety-four thousand, two hundred seventeen".