531608577989 has 2 divisors, whose sum is σ = 531608577990. Its totient is φ = 531608577988.

The previous prime is 531608577949. The next prime is 531608578129. The reversal of 531608577989 is 989775806135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312294321889 + 219314256100 = 558833^2 + 468310^2 .

It is a cyclic number.

It is not a de Polignac number, because 531608577989 - 2²⁰ = 531607529413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531608577919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265804288994 + 265804288995.

It is an arithmetic number, because the mean of its divisors is an integer number (265804288995).

Almost surely, 2^531608577989 is an apocalyptic number.

It is an amenable number.

531608577989 is a deficient number, since it is larger than the sum of its proper divisors (1).

531608577989 is an equidigital number, since it uses as much as digits as its factorization.

531608577989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 114307200, while the sum is 68.

The spelling of 531608577989 in words is "five hundred thirty-one billion, six hundred eight million, five hundred seventy-seven thousand, nine hundred eighty-nine".