111880001638 has 16 divisors (see below), whose sum is σ = 168577056144. Its totient is φ = 55688174080.

The previous prime is 111880001617. The next prime is 111880001647. The reversal of 111880001638 is 836100088111.

111880001638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 111880001597 and 111880001606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297558 + ... + 558838.

It is an arithmetic number, because the mean of its divisors is an integer number (10536066009).

Almost surely, 2^111880001638 is an apocalyptic number.

111880001638 is a deficient number, since it is larger than the sum of its proper divisors (56697054506).

111880001638 is a wasteful number, since it uses less digits than its factorization.

111880001638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262247.

The product of its (nonzero) digits is 9216, while the sum is 37.

Adding to 111880001638 its reverse (836100088111), we get a palindrome (947980089749).

The spelling of 111880001638 in words is "one hundred eleven billion, eight hundred eighty million, one thousand, six hundred thirty-eight".