111141531648 has 208 divisors, whose sum is σ = 376308956160. Its totient is φ = 31754502144.

The previous prime is 111141531647. The next prime is 111141531679. The reversal of 111141531648 is 846135141111.

111141531648 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 4 + 1 + 5 + 3 + 1 + 648 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (111141531647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 702361 + ... + 845927.

Almost surely, 2^111141531648 is an apocalyptic number.

111141531648 is a gapful number since it is divisible by the number (18) 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 111141531648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188154478080).

111141531648 is an abundant number, since it is smaller than the sum of its proper divisors (265167424512).

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

111141531648 is an equidigital number, since it uses as much as digits as its factorization.

111141531648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143607 (or 143579 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

Adding to 111141531648 its reverse (846135141111), we get a palindrome (957276672759).

The spelling of 111141531648 in words is "one hundred eleven billion, one hundred forty-one million, five hundred thirty-one thousand, six hundred forty-eight".