11919823056 has 80 divisors (see below), whose sum is σ = 34403561920. Its totient is φ = 3951296640.

The previous prime is 11919823007. The next prime is 11919823063. The reversal of 11919823056 is 65032891911.

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, 1971 + ... + 154413.

It is an arithmetic number, because the mean of its divisors is an integer number (430044524).

Almost surely, 2^11919823056 is an apocalyptic number.

11919823056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11919823056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17201780960).

11919823056 is an abundant number, since it is smaller than the sum of its proper divisors (22483738864).

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

11919823056 is a wasteful number, since it uses less digits than its factorization.

11919823056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152641 (or 152629 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The spelling of 11919823056 in words is "eleven billion, nine hundred nineteen million, eight hundred twenty-three thousand, fifty-six".