11718454440 has 256 divisors, whose sum is σ = 46137600000. Its totient is φ = 2306810880.

The previous prime is 11718454439. The next prime is 11718454441. The reversal of 11718454440 is 4445481711.

It is an interprime number because it is at equal distance from previous prime (11718454439) and next prime (11718454441).

It is not an unprimeable number, because it can be changed into a prime (11718454441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 142186 + ... + 208934.

It is an arithmetic number, because the mean of its divisors is an integer number (180225000).

Almost surely, 2^11718454440 is an apocalyptic number.

11718454440 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 11718454440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23068800000).

11718454440 is an abundant number, since it is smaller than the sum of its proper divisors (34419145560).

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

11718454440 is a wasteful number, since it uses less digits than its factorization.

11718454440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66800 (or 66796 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The spelling of 11718454440 in words is "eleven billion, seven hundred eighteen million, four hundred fifty-four thousand, four hundred forty".