209587117404 has 192 divisors, whose sum is σ = 595408486400. Its totient is φ = 56048412672.

The previous prime is 209587117403. The next prime is 209587117447. The reversal of 209587117404 is 404711785902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209587117403) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 160849017 + ... + 160850319.

Almost surely, 2^209587117404 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 209587117404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297704243200).

209587117404 is an abundant number, since it is smaller than the sum of its proper divisors (385821368996).

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

209587117404 is a wasteful number, since it uses less digits than its factorization.

209587117404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472 (or 2470 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 209587117404 in words is "two hundred nine billion, five hundred eighty-seven million, one hundred seventeen thousand, four hundred four".