209168255044 has 12 divisors (see below), whose sum is σ = 418336510144. Its totient is φ = 89643537864.

The previous prime is 209168255033. The next prime is 209168255069. The reversal of 209168255044 is 440552861902.

209168255044 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 209168254985 and 209168255003.

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, 3735147384 + ... + 3735147439.

Almost surely, 2^209168255044 is an apocalyptic number.

It is an amenable number.

209168255044 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.

209168255044 is a wasteful number, since it uses less digits than its factorization.

209168255044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7470294834 (or 7470294832 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 209168255044 in words is "two hundred nine billion, one hundred sixty-eight million, two hundred fifty-five thousand, forty-four".