500489944781 has 2 divisors, whose sum is σ = 500489944782. Its totient is φ = 500489944780.

The previous prime is 500489944777. The next prime is 500489944807. The reversal of 500489944781 is 187449984005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 493639734025 + 6850210756 = 702595^2 + 82766^2 .

It is a cyclic number.

It is not a de Polignac number, because 500489944781 - 2² = 500489944777 is a prime.

It is a super-2 number, since 2×500489944781² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 500489944781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (500489974781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250244972390 + 250244972391.

It is an arithmetic number, because the mean of its divisors is an integer number (250244972391).

Almost surely, 2^500489944781 is an apocalyptic number.

It is an amenable number.

500489944781 is a deficient number, since it is larger than the sum of its proper divisors (1).

500489944781 is an equidigital number, since it uses as much as digits as its factorization.

500489944781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 500489944781 in words is "five hundred billion, four hundred eighty-nine million, nine hundred forty-four thousand, seven hundred eighty-one".