208669216838 has 16 divisors (see below), whose sum is σ = 335139593040. Its totient is φ = 97093936896.

The previous prime is 208669216807. The next prime is 208669216843. The reversal of 208669216838 is 838612966802.

It is a congruent number.

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, 34476356 + ... + 34482407.

It is an arithmetic number, because the mean of its divisors is an integer number (20946224565).

Almost surely, 2^208669216838 is an apocalyptic number.

208669216838 is a deficient number, since it is larger than the sum of its proper divisors (126470376202).

208669216838 is a wasteful number, since it uses less digits than its factorization.

208669216838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68958871.

The product of its (nonzero) digits is 11943936, while the sum is 59.

The spelling of 208669216838 in words is "two hundred eight billion, six hundred sixty-nine million, two hundred sixteen thousand, eight hundred thirty-eight".