11982603816 has 96 divisors (see below), whose sum is σ = 34407196200. Its totient is φ = 3754291200.

The previous prime is 11982603793. The next prime is 11982603823. The reversal of 11982603816 is 61830628911.

11982603816 is a `hidden beast` number, since 1 + 1 + 9 + 8 + 260 + 381 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10537843716 + 1444760100 = 102654^2 + 38010^2 .

It is a super-2 number, since 2×11982603816² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 984166 + ... + 996266.

Almost surely, 2^11982603816 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 11982603816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17203598100).

11982603816 is an abundant number, since it is smaller than the sum of its proper divisors (22424592384).

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

11982603816 is a wasteful number, since it uses less digits than its factorization.

11982603816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12939 (or 12932 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 11982603816 in words is "eleven billion, nine hundred eighty-two million, six hundred three thousand, eight hundred sixteen".