56817537589 has 2 divisors, whose sum is σ = 56817537590. Its totient is φ = 56817537588.

The previous prime is 56817537587. The next prime is 56817537593. The reversal of 56817537589 is 98573571865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36134208100 + 20683329489 = 190090^2 + 143817^2 .

It is a cyclic number.

It is not a de Polignac number, because 56817537589 - 2¹ = 56817537587 is a prime.

Together with 56817537587, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 56817537589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56817537587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28408768794 + 28408768795.

It is an arithmetic number, because the mean of its divisors is an integer number (28408768795).

Almost surely, 2^56817537589 is an apocalyptic number.

It is an amenable number.

56817537589 is a deficient number, since it is larger than the sum of its proper divisors (1).

56817537589 is an equidigital number, since it uses as much as digits as its factorization.

56817537589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504000, while the sum is 64.

The spelling of 56817537589 in words is "fifty-six billion, eight hundred seventeen million, five hundred thirty-seven thousand, five hundred eighty-nine".