11785665850 has 48 divisors (see below), whose sum is σ = 25064217216. Its totient is φ = 4038984000.

The previous prime is 11785665841. The next prime is 11785665863. The reversal of 11785665850 is 5856658711.

It is a happy number.

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 23 ways as a sum of consecutive naturals, for example, 942640 + ... + 955060.

It is an arithmetic number, because the mean of its divisors is an integer number (522171192).

Almost surely, 2^11785665850 is an apocalyptic number.

11785665850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11785665850 is an abundant number, since it is smaller than the sum of its proper divisors (13278551366).

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

11785665850 is a wasteful number, since it uses less digits than its factorization.

11785665850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15151 (or 15146 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 52.

The spelling of 11785665850 in words is "eleven billion, seven hundred eighty-five million, six hundred sixty-five thousand, eight hundred fifty".