111859250209589 has 2 divisors, whose sum is σ = 111859250209590. Its totient is φ = 111859250209588.

The previous prime is 111859250209579. The next prime is 111859250209613. The reversal of 111859250209589 is 985902052958111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110530360008964 + 1328890200625 = 10513342^2 + 1152775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111859250209589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111859250209579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55929625104794 + 55929625104795.

It is an arithmetic number, because the mean of its divisors is an integer number (55929625104795).

Almost surely, 2^{111859250209589} is an apocalyptic number.

It is an amenable number.

111859250209589 is a deficient number, since it is larger than the sum of its proper divisors (1).

111859250209589 is an equidigital number, since it uses as much as digits as its factorization.

111859250209589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328000, while the sum is 65.

The spelling of 111859250209589 in words is "one hundred eleven trillion, eight hundred fifty-nine billion, two hundred fifty million, two hundred nine thousand, five hundred eighty-nine".