208680808868 has 12 divisors (see below), whose sum is σ = 417361617792. Its totient is φ = 89434632360.

The previous prime is 208680808859. The next prime is 208680808891. The reversal of 208680808868 is 868808086802.

208680808868 is an admirable number.

It is a super-3 number, since 3×208680808868³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 208680808868.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3726442988 + ... + 3726443043.

It is an arithmetic number, because the mean of its divisors is an integer number (34780134816).

Almost surely, 2^208680808868 is an apocalyptic number.

208680808868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

208680808868 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

208680808868 is a wasteful number, since it uses less digits than its factorization.

208680808868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7452886042 (or 7452886040 counting only the distinct ones).

The product of its (nonzero) digits is 18874368, while the sum is 62.

The spelling of 208680808868 in words is "two hundred eight billion, six hundred eighty million, eight hundred eight thousand, eight hundred sixty-eight".