111869423280 has 480 divisors, whose sum is σ = 401117184000. Its totient is φ = 27894343680.

The previous prime is 111869423233. The next prime is 111869423311. The reversal of 111869423280 is 82324968111.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 87465681 + ... + 87466959.

It is an arithmetic number, because the mean of its divisors is an integer number (835660800).

Almost surely, 2^111869423280 is an apocalyptic number.

111869423280 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 111869423280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200558592000).

111869423280 is an abundant number, since it is smaller than the sum of its proper divisors (289247760720).

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

111869423280 is a wasteful number, since it uses less digits than its factorization.

111869423280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457 (or 1448 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 111869423280 in words is "one hundred eleven billion, eight hundred sixty-nine million, four hundred twenty-three thousand, two hundred eighty".