208691303905968 has 40 divisors (see below), whose sum is σ = 580589909586288. Its totient is φ = 64212708893952.

The previous prime is 208691303905813. The next prime is 208691303905993. The reversal of 208691303905968 is 869509303196802.

It is a super-2 number, since 2×208691303905968² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167220595455 + ... + 167220596702.

Almost surely, 2^{208691303905968} is an apocalyptic number.

It is an amenable number.

208691303905968 is an abundant number, since it is smaller than the sum of its proper divisors (371898605680320).

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

208691303905968 is a wasteful number, since it uses less digits than its factorization.

208691303905968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334441192181 (or 334441192175 counting only the distinct ones).

The product of its (nonzero) digits is 151165440, while the sum is 69.

The spelling of 208691303905968 in words is "two hundred eight trillion, six hundred ninety-one billion, three hundred three million, nine hundred five thousand, nine hundred sixty-eight".