209324191072 has 96 divisors (see below), whose sum is σ = 435781382400. Its totient is φ = 98701244928.

The previous prime is 209324191051. The next prime is 209324191099. The reversal of 209324191072 is 270191423902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195812554 + ... + 195813622.

It is an arithmetic number, because the mean of its divisors is an integer number (4539389400).

Almost surely, 2^209324191072 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 209324191072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217890691200).

209324191072 is an abundant number, since it is smaller than the sum of its proper divisors (226457191328).

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

209324191072 is a wasteful number, since it uses less digits than its factorization.

209324191072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268 (or 2260 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 209324191072 in words is "two hundred nine billion, three hundred twenty-four million, one hundred ninety-one thousand, seventy-two".