11909784845 has 8 divisors (see below), whose sum is σ = 16333419264. Its totient is φ = 8166709584.

The previous prime is 11909784841. The next prime is 11909784853. The reversal of 11909784845 is 54848790911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11909784845 - 2² = 11909784841 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11909784841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170139749 + ... + 170139818.

It is an arithmetic number, because the mean of its divisors is an integer number (2041677408).

Almost surely, 2^11909784845 is an apocalyptic number.

It is an amenable number.

11909784845 is a deficient number, since it is larger than the sum of its proper divisors (4423634419).

11909784845 is an equidigital number, since it uses as much as digits as its factorization.

11909784845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340279579.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 11909784845 in words is "eleven billion, nine hundred nine million, seven hundred eighty-four thousand, eight hundred forty-five".