209994263835136 has 640 divisors, whose sum is σ = 499134913820928. Its totient is φ = 87199580160000.

The previous prime is 209994263835077. The next prime is 209994263835157. The reversal of 209994263835136 is 631538362499902.

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, 174849511336 + ... + 174849512536.

Almost surely, 2^{209994263835136} 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 209994263835136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249567456910464).

209994263835136 is an abundant number, since it is smaller than the sum of its proper divisors (289140649985792).

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

209994263835136 is a wasteful number, since it uses less digits than its factorization.

209994263835136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692 (or 1676 counting only the distinct ones).

The product of its (nonzero) digits is 453496320, while the sum is 70.

The spelling of 209994263835136 in words is "two hundred nine trillion, nine hundred ninety-four billion, two hundred sixty-three million, eight hundred thirty-five thousand, one hundred thirty-six".