111604131078 has 64 divisors (see below), whose sum is σ = 249435728640. Its totient is φ = 33003392000.

The previous prime is 111604131061. The next prime is 111604131109. The reversal of 111604131078 is 870131406111.

111604131078 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 428878 + ... + 638078.

It is an arithmetic number, because the mean of its divisors is an integer number (3897433260).

Almost surely, 2^111604131078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111604131078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124717864320).

111604131078 is an abundant number, since it is smaller than the sum of its proper divisors (137831597562).

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

111604131078 is a wasteful number, since it uses less digits than its factorization.

111604131078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209413.

The product of its (nonzero) digits is 4032, while the sum is 33.

Adding to 111604131078 its reverse (870131406111), we get a palindrome (981735537189).

The spelling of 111604131078 in words is "one hundred eleven billion, six hundred four million, one hundred thirty-one thousand, seventy-eight".