208800664281 has 24 divisors (see below), whose sum is σ = 329237213760. Its totient is φ = 126462016800.

The previous prime is 208800664277. The next prime is 208800664297. The reversal of 208800664281 is 182466008802.

It is not a de Polignac number, because 208800664281 - 2² = 208800664277 is a prime.

It is a super-2 number, since 2×208800664281² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (208800664211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 548326 + ... + 847503.

It is an arithmetic number, because the mean of its divisors is an integer number (13718217240).

Almost surely, 2^208800664281 is an apocalyptic number.

It is an amenable number.

208800664281 is a deficient number, since it is larger than the sum of its proper divisors (120436549479).

208800664281 is a wasteful number, since it uses less digits than its factorization.

208800664281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397357 (or 1397354 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The spelling of 208800664281 in words is "two hundred eight billion, eight hundred million, six hundred sixty-four thousand, two hundred eighty-one".