111453430542520 has 256 divisors, whose sum is σ = 290605144780800. Its totient is φ = 38020092149760.

The previous prime is 111453430542511. The next prime is 111453430542613. The reversal of 111453430542520 is 25245034354111.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6399108852 + ... + 6399126268.

It is an arithmetic number, because the mean of its divisors is an integer number (1135176346800).

Almost surely, 2^{111453430542520} is an apocalyptic number.

111453430542520 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 111453430542520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145302572390400).

111453430542520 is an abundant number, since it is smaller than the sum of its proper divisors (179151714238280).

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

111453430542520 is a wasteful number, since it uses less digits than its factorization.

111453430542520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20198 (or 20194 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 111453430542520 its reverse (25245034354111), we get a palindrome (136698464896631).

The spelling of 111453430542520 in words is "one hundred eleven trillion, four hundred fifty-three billion, four hundred thirty million, five hundred forty-two thousand, five hundred twenty".