11782985816 has 64 divisors (see below), whose sum is σ = 25807680000. Its totient is φ = 4939038720.

The previous prime is 11782985803. The next prime is 11782985833. The reversal of 11782985816 is 61858928711.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 648536 + ... + 666456.

It is an arithmetic number, because the mean of its divisors is an integer number (403245000).

Almost surely, 2^11782985816 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 11782985816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12903840000).

11782985816 is an abundant number, since it is smaller than the sum of its proper divisors (14024694184).

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

11782985816 is a wasteful number, since it uses less digits than its factorization.

11782985816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18192 (or 18188 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 56.

The spelling of 11782985816 in words is "eleven billion, seven hundred eighty-two million, nine hundred eighty-five thousand, eight hundred sixteen".