111445131540 has 192 divisors, whose sum is σ = 325010423808. Its totient is φ = 28510540800.

The previous prime is 111445131529. The next prime is 111445131583. The reversal of 111445131540 is 45131544111.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 111445131498 and 111445131507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 102524877 + ... + 102525963.

It is an arithmetic number, because the mean of its divisors is an integer number (1692762624).

Almost surely, 2^111445131540 is an apocalyptic number.

111445131540 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 111445131540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162505211904).

111445131540 is an abundant number, since it is smaller than the sum of its proper divisors (213565292268).

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

111445131540 is a wasteful number, since it uses less digits than its factorization.

111445131540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798 (or 1796 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 111445131540 its reverse (45131544111), we get a palindrome (156576675651).

The spelling of 111445131540 in words is "one hundred eleven billion, four hundred forty-five million, one hundred thirty-one thousand, five hundred forty".