209040890241 has 8 divisors (see below), whose sum is σ = 278724743584. Its totient is φ = 139358815200.

The previous prime is 209040890209. The next prime is 209040890249. The reversal of 209040890241 is 142098040902.

209040890241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 209040890241 - 2⁵ = 209040890209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 209040890241.

It is not an unprimeable number, because it can be changed into a prime (209040890249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140596 + ... + 661701.

It is an arithmetic number, because the mean of its divisors is an integer number (34840592948).

Almost surely, 2^209040890241 is an apocalyptic number.

It is an amenable number.

209040890241 is a deficient number, since it is larger than the sum of its proper divisors (69683853343).

209040890241 is an equidigital number, since it uses as much as digits as its factorization.

209040890241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889151.

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 209040890241 in words is "two hundred nine billion, forty million, eight hundred ninety thousand, two hundred forty-one".