11518713840 has 160 divisors (see below), whose sum is σ = 36651779136. Its totient is φ = 2990776320.

The previous prime is 11518713781. The next prime is 11518713847. The reversal of 11518713840 is 4831781511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11518713847) 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 31 ways as a sum of consecutive naturals, for example, 7211922 + ... + 7213518.

Almost surely, 2^11518713840 is an apocalyptic number.

11518713840 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 11518713840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18325889568).

11518713840 is an abundant number, since it is smaller than the sum of its proper divisors (25133065296).

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

11518713840 is a wasteful number, since it uses less digits than its factorization.

11518713840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387 (or 2381 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 39.

The spelling of 11518713840 in words is "eleven billion, five hundred eighteen million, seven hundred thirteen thousand, eight hundred forty".