209698698680 has 32 divisors (see below), whose sum is σ = 481860843840. Its totient is φ = 82094808960.

The previous prime is 209698698679. The next prime is 209698698691. The reversal of 209698698680 is 86896896902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55769051 + ... + 55772810.

It is an arithmetic number, because the mean of its divisors is an integer number (15058151370).

Almost surely, 2^209698698680 is an apocalyptic number.

209698698680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209698698680 is an abundant number, since it is smaller than the sum of its proper divisors (272162145160).

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

209698698680 is a wasteful number, since it uses less digits than its factorization.

209698698680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111541919 (or 111541915 counting only the distinct ones).

The product of its (nonzero) digits is 161243136, while the sum is 71.

The spelling of 209698698680 in words is "two hundred nine billion, six hundred ninety-eight million, six hundred ninety-eight thousand, six hundred eighty".