11771609904 has 160 divisors (see below), whose sum is σ = 35636806400. Its totient is φ = 3710085120.

The previous prime is 11771609873. The next prime is 11771609911. The reversal of 11771609904 is 40990617711.

It is a self number, because there is not a number n which added to its sum of digits gives 11771609904.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5522919 + ... + 5525049.

It is an arithmetic number, because the mean of its divisors is an integer number (222730040).

Almost surely, 2^11771609904 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 11771609904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17818403200).

11771609904 is an abundant number, since it is smaller than the sum of its proper divisors (23865196496).

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

11771609904 is a wasteful number, since it uses less digits than its factorization.

11771609904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2840 (or 2828 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 45.

The spelling of 11771609904 in words is "eleven billion, seven hundred seventy-one million, six hundred nine thousand, nine hundred four".