208663770768 has 40 divisors (see below), whose sum is σ = 539808456000. Its totient is φ = 69456476544.

The previous prime is 208663770767. The next prime is 208663770817. The reversal of 208663770768 is 867077366802.

208663770768 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×208663770768² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (208663770767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3031668 + ... + 3099731.

It is an arithmetic number, because the mean of its divisors is an integer number (13495211400).

Almost surely, 2^208663770768 is an apocalyptic number.

It is an amenable number.

208663770768 is an abundant number, since it is smaller than the sum of its proper divisors (331144685232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208663770768 is a wasteful number, since it uses less digits than its factorization.

208663770768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6132119 (or 6132113 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 60.

The spelling of 208663770768 in words is "two hundred eight billion, six hundred sixty-three million, seven hundred seventy thousand, seven hundred sixty-eight".