11940489856 has 64 divisors (see below), whose sum is σ = 24230304000. Its totient is φ = 5859495936.

The previous prime is 11940489853. The next prime is 11940489877. The reversal of 11940489856 is 65898404911.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 11940489797 and 11940489806.

It is not an unprimeable number, because it can be changed into a prime (11940489853) 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, 7619185 + ... + 7620751.

It is an arithmetic number, because the mean of its divisors is an integer number (378598500).

Almost surely, 2^11940489856 is an apocalyptic number.

11940489856 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 11940489856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12115152000).

11940489856 is an abundant number, since it is smaller than the sum of its proper divisors (12289814144).

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

11940489856 is a wasteful number, since it uses less digits than its factorization.

11940489856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649 (or 2637 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 11940489856 in words is "eleven billion, nine hundred forty million, four hundred eighty-nine thousand, eight hundred fifty-six".