206288145169 has 2 divisors, whose sum is σ = 206288145170. Its totient is φ = 206288145168.

The previous prime is 206288145059. The next prime is 206288145221. The reversal of 206288145169 is 961541882602.

It is an a-pointer prime, because the next prime (206288145221) can be obtained adding 206288145169 to its sum of digits (52).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160977488400 + 45310656769 = 401220^2 + 212863^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206288145169 is a prime.

It is a super-2 number, since 2×206288145169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206288145769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103144072584 + 103144072585.

It is an arithmetic number, because the mean of its divisors is an integer number (103144072585).

Almost surely, 2^206288145169 is an apocalyptic number.

It is an amenable number.

206288145169 is a deficient number, since it is larger than the sum of its proper divisors (1).

206288145169 is an equidigital number, since it uses as much as digits as its factorization.

206288145169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 206288145169 in words is "two hundred six billion, two hundred eighty-eight million, one hundred forty-five thousand, one hundred sixty-nine".