11963165856 has 96 divisors (see below), whose sum is σ = 32448665088. Its totient is φ = 3855237120.

The previous prime is 11963165849. The next prime is 11963165867. The reversal of 11963165856 is 65856136911.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 11963165799 and 11963165808.

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, 5930160 + ... + 5932176.

It is an arithmetic number, because the mean of its divisors is an integer number (338006928).

Almost surely, 2^11963165856 is an apocalyptic number.

11963165856 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 11963165856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16224332544).

11963165856 is an abundant number, since it is smaller than the sum of its proper divisors (20485499232).

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

11963165856 is a wasteful number, since it uses less digits than its factorization.

11963165856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054 (or 4046 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 51.

The spelling of 11963165856 in words is "eleven billion, nine hundred sixty-three million, one hundred sixty-five thousand, eight hundred fifty-six".