2109665250 has 576 divisors, whose sum is σ = 7612690176. Its totient is φ = 427680000.

The previous prime is 2109665249. The next prime is 2109665263. The reversal of 2109665250 is 525669012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 51455230 + ... + 51455270.

It is an arithmetic number, because the mean of its divisors is an integer number (13216476).

Almost surely, 2^2109665250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2109665250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3806345088).

2109665250 is an abundant number, since it is smaller than the sum of its proper divisors (5503024926).

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

2109665250 is a wasteful number, since it uses less digits than its factorization.

2109665250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 2109665250 is about 45931.0924102617. The cubic root of 2109665250 is about 1282.5407804823.

The spelling of 2109665250 in words is "two billion, one hundred nine million, six hundred sixty-five thousand, two hundred fifty".