11956336218 has 12 divisors (see below), whose sum is σ = 25905395178. Its totient is φ = 3985445400.

The previous prime is 11956336151. The next prime is 11956336219. The reversal of 11956336218 is 81263365911.

11956336218 is a `hidden beast` number, since 1 + 1 + 9 + 5 + 633 + 6 + 2 + 1 + 8 = 666.

11956336218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8327840049 + 3628496169 = 91257^2 + 60237^2 .

It is not an unprimeable number, because it can be changed into a prime (11956336219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 332120433 + ... + 332120468.

Almost surely, 2^11956336218 is an apocalyptic number.

11956336218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11956336218 is an abundant number, since it is smaller than the sum of its proper divisors (13949058960).

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

11956336218 is a wasteful number, since it uses less digits than its factorization.

11956336218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664240909 (or 664240906 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The spelling of 11956336218 in words is "eleven billion, nine hundred fifty-six million, three hundred thirty-six thousand, two hundred eighteen".