111538195488 has 432 divisors, whose sum is σ = 346139506440. Its totient is φ = 34000404480.

The previous prime is 111538195471. The next prime is 111538195499. The reversal of 111538195488 is 884591835111.

111538195488 is a `hidden beast` number, since 1 + 1 + 15 + 3 + 81 + 9 + 548 + 8 = 666.

111538195488 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 898704 + 111537296784 = 948^2 + 333972^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1149878256 + ... + 1149878352.

Almost surely, 2^111538195488 is an apocalyptic number.

111538195488 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 111538195488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173069753220).

111538195488 is an abundant number, since it is smaller than the sum of its proper divisors (234601310952).

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

111538195488 is a wasteful number, since it uses less digits than its factorization.

111538195488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 229 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 54.

The spelling of 111538195488 in words is "one hundred eleven billion, five hundred thirty-eight million, one hundred ninety-five thousand, four hundred eighty-eight".