11918206608 has 640 divisors, whose sum is σ = 43334369280. Its totient is φ = 2728028160.

The previous prime is 11918206603. The next prime is 11918206661. The reversal of 11918206608 is 80660281911.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 11918206608.

It is not an unprimeable number, because it can be changed into a prime (11918206603) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 75912066 + ... + 75912222.

It is an arithmetic number, because the mean of its divisors is an integer number (67709952).

Almost surely, 2^11918206608 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 11918206608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21667184640).

11918206608 is an abundant number, since it is smaller than the sum of its proper divisors (31416162672).

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

11918206608 is a wasteful number, since it uses less digits than its factorization.

11918206608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 42.

The spelling of 11918206608 in words is "eleven billion, nine hundred eighteen million, two hundred six thousand, six hundred eight".