209146112912568 has 256 divisors, whose sum is σ = 577196808652800. Its totient is φ = 62762417602560.

The previous prime is 209146112912543. The next prime is 209146112912741. The reversal of 209146112912568 is 865219211641902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1250334058 + ... + 1250501318.

It is an arithmetic number, because the mean of its divisors is an integer number (2254675033800).

Almost surely, 2^{209146112912568} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209146112912568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288598404326400).

209146112912568 is an abundant number, since it is smaller than the sum of its proper divisors (368050695740232).

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

209146112912568 is a wasteful number, since it uses less digits than its factorization.

209146112912568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167982 (or 167978 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 57.

The spelling of 209146112912568 in words is "two hundred nine trillion, one hundred forty-six billion, one hundred twelve million, nine hundred twelve thousand, five hundred sixty-eight".