111640043664 has 240 divisors, whose sum is σ = 343709376192. Its totient is φ = 34958905344.

The previous prime is 111640043629. The next prime is 111640043677. The reversal of 111640043664 is 466340046111.

111640043664 is a `hidden beast` number, since 1 + 1 + 1 + 640 + 0 + 4 + 3 + 6 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45142332 + ... + 45144804.

Almost surely, 2^111640043664 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 111640043664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171854688096).

111640043664 is an abundant number, since it is smaller than the sum of its proper divisors (232069332528).

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

111640043664 is a wasteful number, since it uses less digits than its factorization.

111640043664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196 (or 3178 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

Adding to 111640043664 its reverse (466340046111), we get a palindrome (577980089775).

The spelling of 111640043664 in words is "one hundred eleven billion, six hundred forty million, forty-three thousand, six hundred sixty-four".