209616076830 has 128 divisors (see below), whose sum is σ = 524444368896. Its totient is φ = 53561088000.

The previous prime is 209616076807. The next prime is 209616076841. The reversal of 209616076830 is 38670616902.

It is a self number, because there is not a number n which added to its sum of digits gives 209616076830.

It is a congruent number.

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, 70982634 + ... + 70985586.

It is an arithmetic number, because the mean of its divisors is an integer number (4097221632).

Almost surely, 2^209616076830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209616076830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262222184448).

209616076830 is an abundant number, since it is smaller than the sum of its proper divisors (314828292066).

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

209616076830 is a wasteful number, since it uses less digits than its factorization.

209616076830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 209616076830 in words is "two hundred nine billion, six hundred sixteen million, seventy-six thousand, eight hundred thirty".