209016740833 has 2 divisors, whose sum is σ = 209016740834. Its totient is φ = 209016740832.

The previous prime is 209016740831. The next prime is 209016740861. The reversal of 209016740833 is 338047610902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181470036049 + 27546704784 = 425993^2 + 165972^2 .

It is a cyclic number.

It is not a de Polignac number, because 209016740833 - 2¹ = 209016740831 is a prime.

Together with 209016740831, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 209016740833.

It is not a weakly prime, because it can be changed into another prime (209016740831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104508370416 + 104508370417.

It is an arithmetic number, because the mean of its divisors is an integer number (104508370417).

Almost surely, 2^209016740833 is an apocalyptic number.

It is an amenable number.

209016740833 is a deficient number, since it is larger than the sum of its proper divisors (1).

209016740833 is an equidigital number, since it uses as much as digits as its factorization.

209016740833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 209016740833 in words is "two hundred nine billion, sixteen million, seven hundred forty thousand, eight hundred thirty-three".