205597535089 has 2 divisors, whose sum is σ = 205597535090. Its totient is φ = 205597535088.

The previous prime is 205597535041. The next prime is 205597535147. The reversal of 205597535089 is 980535795502.

It is an a-pointer prime, because the next prime (205597535147) can be obtained adding 205597535089 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188829357025 + 16768178064 = 434545^2 + 129492^2 .

It is a cyclic number.

It is not a de Polignac number, because 205597535089 - 2²⁷ = 205463317361 is a prime.

It is not a weakly prime, because it can be changed into another prime (205597535009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102798767544 + 102798767545.

It is an arithmetic number, because the mean of its divisors is an integer number (102798767545).

Almost surely, 2^205597535089 is an apocalyptic number.

It is an amenable number.

205597535089 is a deficient number, since it is larger than the sum of its proper divisors (1).

205597535089 is an equidigital number, since it uses as much as digits as its factorization.

205597535089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010000, while the sum is 58.

The spelling of 205597535089 in words is "two hundred five billion, five hundred ninety-seven million, five hundred thirty-five thousand, eighty-nine".