209047641601 has 2 divisors, whose sum is σ = 209047641602. Its totient is φ = 209047641600.

The previous prime is 209047641599. The next prime is 209047641629. The reversal of 209047641601 is 106146740902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189573160000 + 19474481601 = 435400^2 + 139551^2 .

It is a cyclic number.

It is not a de Polignac number, because 209047641601 - 2¹ = 209047641599 is a prime.

Together with 209047641599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (209047941601) 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, 104523820800 + 104523820801.

It is an arithmetic number, because the mean of its divisors is an integer number (104523820801).

Almost surely, 2^209047641601 is an apocalyptic number.

It is an amenable number.

209047641601 is a deficient number, since it is larger than the sum of its proper divisors (1).

209047641601 is an equidigital number, since it uses as much as digits as its factorization.

209047641601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 209047641601 in words is "two hundred nine billion, forty-seven million, six hundred forty-one thousand, six hundred one".