209471275008 has 432 divisors, whose sum is σ = 638932668192. Its totient is φ = 66060288000.

The previous prime is 209471274989. The next prime is 209471275103. The reversal of 209471275008 is 800572174902.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2950299613 + ... + 2950299683.

It is an arithmetic number, because the mean of its divisors is an integer number (1479010806).

Almost surely, 2^209471275008 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 209471275008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319466334096).

209471275008 is an abundant number, since it is smaller than the sum of its proper divisors (429461393184).

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

209471275008 is an frugal number, since it uses more digits than its factorization.

209471275008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 209471275008 in words is "two hundred nine billion, four hundred seventy-one million, two hundred seventy-five thousand, eight".