111420071784 has 144 divisors (see below), whose sum is σ = 362353979520. Its totient is φ = 30807362880.

The previous prime is 111420071779. The next prime is 111420071813. The reversal of 111420071784 is 487170024111.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 400014 + ... + 618749.

It is an arithmetic number, because the mean of its divisors is an integer number (2516347080).

Almost surely, 2^111420071784 is an apocalyptic number.

111420071784 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

111420071784 is an abundant number, since it is smaller than the sum of its proper divisors (250933907736).

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

111420071784 is a wasteful number, since it uses less digits than its factorization.

111420071784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018820 (or 1018806 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

Adding to 111420071784 its reverse (487170024111), we get a palindrome (598590095895).

The spelling of 111420071784 in words is "one hundred eleven billion, four hundred twenty million, seventy-one thousand, seven hundred eighty-four".