209968109596 has 12 divisors (see below), whose sum is σ = 419936219248. Its totient is φ = 89986332672.

The previous prime is 209968109569. The next prime is 209968109597. The reversal of 209968109596 is 695901869902.

It is a happy number.

209968109596 is an admirable number.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209968109597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3749430501 + ... + 3749430556.

Almost surely, 2^209968109596 is an apocalyptic number.

It is an amenable number.

209968109596 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.

209968109596 is a wasteful number, since it uses less digits than its factorization.

209968109596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7498861068 (or 7498861066 counting only the distinct ones).

The product of its (nonzero) digits is 18895680, while the sum is 64.

The spelling of 209968109596 in words is "two hundred nine billion, nine hundred sixty-eight million, one hundred nine thousand, five hundred ninety-six".