11663815320 has 288 divisors, whose sum is σ = 40068166320. Its totient is φ = 3051302400.

The previous prime is 11663815291. The next prime is 11663815327. The reversal of 11663815320 is 2351836611.

11663815320 is a `hidden beast` number, since 1 + 1 + 6 + 638 + 15 + 3 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11663815327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 107007426 + ... + 107007534.

Almost surely, 2^11663815320 is an apocalyptic number.

11663815320 is a gapful number since it is divisible by the number (10) 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 11663815320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20034083160).

11663815320 is an abundant number, since it is smaller than the sum of its proper divisors (28404351000).

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

11663815320 is a wasteful number, since it uses less digits than its factorization.

11663815320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 11663815320 in words is "eleven billion, six hundred sixty-three million, eight hundred fifteen thousand, three hundred twenty".