561087747589 has 2 divisors, whose sum is σ = 561087747590. Its totient is φ = 561087747588.

The previous prime is 561087747581. The next prime is 561087747599. The reversal of 561087747589 is 985747780165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 346132188900 + 214955558689 = 588330^2 + 463633^2 .

It is a cyclic number.

It is not a de Polignac number, because 561087747589 - 2³ = 561087747581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561087747581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280543873794 + 280543873795.

It is an arithmetic number, because the mean of its divisors is an integer number (280543873795).

Almost surely, 2^561087747589 is an apocalyptic number.

It is an amenable number.

561087747589 is a deficient number, since it is larger than the sum of its proper divisors (1).

561087747589 is an equidigital number, since it uses as much as digits as its factorization.

561087747589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118540800, while the sum is 67.

The spelling of 561087747589 in words is "five hundred sixty-one billion, eighty-seven million, seven hundred forty-seven thousand, five hundred eighty-nine".