208118836641 has 16 divisors (see below), whose sum is σ = 280299368448. Its totient is φ = 137342688000.

The previous prime is 208118836621. The next prime is 208118836741. The reversal of 208118836641 is 146638811802.

208118836641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 208118836641 - 2¹¹ = 208118834593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (208118836621) 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 15 ways as a sum of consecutive naturals, for example, 1388256 + ... + 1530846.

It is an arithmetic number, because the mean of its divisors is an integer number (17518710528).

Almost surely, 2^208118836641 is an apocalyptic number.

It is an amenable number.

208118836641 is a deficient number, since it is larger than the sum of its proper divisors (72180531807).

208118836641 is a wasteful number, since it uses less digits than its factorization.

208118836641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147512.

The product of its (nonzero) digits is 442368, while the sum is 48.

The spelling of 208118836641 in words is "two hundred eight billion, one hundred eighteen million, eight hundred thirty-six thousand, six hundred forty-one".