500511243623681 has 2 divisors, whose sum is σ = 500511243623682. Its totient is φ = 500511243623680.

The previous prime is 500511243623623. The next prime is 500511243623717. The reversal of 500511243623681 is 186326342115005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406611093160000 + 93900150463681 = 20164600^2 + 9690209^2 .

It is a cyclic number.

It is not a de Polignac number, because 500511243623681 - 2⁶ = 500511243623617 is a prime.

It is a super-2 number, since 2×500511243623681² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (500511243623981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250255621811840 + 250255621811841.

It is an arithmetic number, because the mean of its divisors is an integer number (250255621811841).

Almost surely, 2^{500511243623681} is an apocalyptic number.

It is an amenable number.

500511243623681 is a deficient number, since it is larger than the sum of its proper divisors (1).

500511243623681 is an equidigital number, since it uses as much as digits as its factorization.

500511243623681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 47.

Adding to 500511243623681 its reverse (186326342115005), we get a palindrome (686837585738686).

The spelling of 500511243623681 in words is "five hundred trillion, five hundred eleven billion, two hundred forty-three million, six hundred twenty-three thousand, six hundred eighty-one".