111565606565089 has 2 divisors, whose sum is σ = 111565606565090. Its totient is φ = 111565606565088.

The previous prime is 111565606565033. The next prime is 111565606565113. The reversal of 111565606565089 is 980565606565111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99510440642064 + 12055165923025 = 9975492^2 + 3472055^2 .

It is a cyclic number.

It is not a de Polignac number, because 111565606565089 - 2²⁵ = 111565573010657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111565606565089.

It is not a weakly prime, because it can be changed into another prime (111565606565489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55782803282544 + 55782803282545.

It is an arithmetic number, because the mean of its divisors is an integer number (55782803282545).

Almost surely, 2^{111565606565089} is an apocalyptic number.

It is an amenable number.

111565606565089 is a deficient number, since it is larger than the sum of its proper divisors (1).

111565606565089 is an equidigital number, since it uses as much as digits as its factorization.

111565606565089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320000, while the sum is 64.

The spelling of 111565606565089 in words is "one hundred eleven trillion, five hundred sixty-five billion, six hundred six million, five hundred sixty-five thousand, eighty-nine".