201285165889 has 2 divisors, whose sum is σ = 201285165890. Its totient is φ = 201285165888.

The previous prime is 201285165883. The next prime is 201285165911. The reversal of 201285165889 is 988561582102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201077805889 + 207360000 = 448417^2 + 14400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201285165889 is a prime.

It is not a weakly prime, because it can be changed into another prime (201285165883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100642582944 + 100642582945.

It is an arithmetic number, because the mean of its divisors is an integer number (100642582945).

Almost surely, 2^201285165889 is an apocalyptic number.

It is an amenable number.

201285165889 is a deficient number, since it is larger than the sum of its proper divisors (1).

201285165889 is an equidigital number, since it uses as much as digits as its factorization.

201285165889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2764800, while the sum is 55.

The spelling of 201285165889 in words is "two hundred one billion, two hundred eighty-five million, one hundred sixty-five thousand, eight hundred eighty-nine".