505561059917 has 2 divisors, whose sum is σ = 505561059918. Its totient is φ = 505561059916.

The previous prime is 505561059889. The next prime is 505561060007. The reversal of 505561059917 is 719950165505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417870452041 + 87690607876 = 646429^2 + 296126^2 .

It is a cyclic number.

It is not a de Polignac number, because 505561059917 - 2¹⁶ = 505560994381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505561059617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252780529958 + 252780529959.

It is an arithmetic number, because the mean of its divisors is an integer number (252780529959).

Almost surely, 2^505561059917 is an apocalyptic number.

It is an amenable number.

505561059917 is a deficient number, since it is larger than the sum of its proper divisors (1).

505561059917 is an equidigital number, since it uses as much as digits as its factorization.

505561059917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2126250, while the sum is 53.

The spelling of 505561059917 in words is "five hundred five billion, five hundred sixty-one million, fifty-nine thousand, nine hundred seventeen".