111432420440 has 128 divisors (see below), whose sum is σ = 275424364800. Its totient is φ = 40239137280.

The previous prime is 111432420431. The next prime is 111432420493. The reversal of 111432420440 is 44024234111.

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, 46642766 + ... + 46645154.

It is an arithmetic number, because the mean of its divisors is an integer number (2151752850).

Almost surely, 2^111432420440 is an apocalyptic number.

111432420440 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 111432420440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137712182400).

111432420440 is an abundant number, since it is smaller than the sum of its proper divisors (163991944360).

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

111432420440 is a wasteful number, since it uses less digits than its factorization.

111432420440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3105 (or 3101 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 111432420440 its reverse (44024234111), we get a palindrome (155456654551).

The spelling of 111432420440 in words is "one hundred eleven billion, four hundred thirty-two million, four hundred twenty thousand, four hundred forty".