561288089077 has 2 divisors, whose sum is σ = 561288089078. Its totient is φ = 561288089076.

The previous prime is 561288089017. The next prime is 561288089093. The reversal of 561288089077 is 770980882165.

561288089077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 448720457956 + 112567631121 = 669866^2 + 335511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561288089077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561288089017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280644044538 + 280644044539.

It is an arithmetic number, because the mean of its divisors is an integer number (280644044539).

Almost surely, 2^561288089077 is an apocalyptic number.

It is an amenable number.

561288089077 is a deficient number, since it is larger than the sum of its proper divisors (1).

561288089077 is an equidigital number, since it uses as much as digits as its factorization.

561288089077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13547520, while the sum is 61.

The spelling of 561288089077 in words is "five hundred sixty-one billion, two hundred eighty-eight million, eighty-nine thousand, seventy-seven".