11718287856 has 60 divisors (see below), whose sum is σ = 35776292760. Its totient is φ = 3550995840.

The previous prime is 11718287837. The next prime is 11718287857. The reversal of 11718287856 is 65878281711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11718287857) 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 11 ways as a sum of consecutive naturals, for example, 3697371 + ... + 3700538.

It is an arithmetic number, because the mean of its divisors is an integer number (596271546).

Almost surely, 2^11718287856 is an apocalyptic number.

11718287856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11718287856 is an abundant number, since it is smaller than the sum of its proper divisors (24058004904).

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

11718287856 is a wasteful number, since it uses less digits than its factorization.

11718287856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7397934 (or 7397925 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 54.

The spelling of 11718287856 in words is "eleven billion, seven hundred eighteen million, two hundred eighty-seven thousand, eight hundred fifty-six".