208659568641 has 16 divisors (see below), whose sum is σ = 295320253824. Its totient is φ = 130593855744.

The previous prime is 208659568633. The next prime is 208659568651. The reversal of 208659568641 is 146865956802.

It is not a de Polignac number, because 208659568641 - 2³ = 208659568633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (208659568651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5132605 + ... + 5173098.

It is an arithmetic number, because the mean of its divisors is an integer number (18457515864).

Almost surely, 2^208659568641 is an apocalyptic number.

It is an amenable number.

208659568641 is a deficient number, since it is larger than the sum of its proper divisors (86660685183).

208659568641 is a wasteful number, since it uses less digits than its factorization.

208659568641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10306120.

The product of its (nonzero) digits is 24883200, while the sum is 60.

The spelling of 208659568641 in words is "two hundred eight billion, six hundred fifty-nine million, five hundred sixty-eight thousand, six hundred forty-one".