204220288866 has 16 divisors (see below), whose sum is σ = 445571539488. Its totient is φ = 61884936000.

The previous prime is 204220288861. The next prime is 204220288901. The reversal of 204220288866 is 668882022402.

It is not an unprimeable number, because it can be changed into a prime (204220288861) 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, 1547123335 + ... + 1547123466.

It is an arithmetic number, because the mean of its divisors is an integer number (27848221218).

Almost surely, 2^204220288866 is an apocalyptic number.

204220288866 is an abundant number, since it is smaller than the sum of its proper divisors (241351250622).

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

204220288866 is a wasteful number, since it uses less digits than its factorization.

204220288866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094246817.

The product of its (nonzero) digits is 1179648, while the sum is 48.

The spelling of 204220288866 in words is "two hundred four billion, two hundred twenty million, two hundred eighty-eight thousand, eight hundred sixty-six".