111827161841 has 4 divisors (see below), whose sum is σ = 115683270900. Its totient is φ = 107971052784.

The previous prime is 111827161807. The next prime is 111827161847. The reversal of 111827161841 is 148161728111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59489161216 + 52338000625 = 243904^2 + 228775^2 .

It is a cyclic number.

It is not a de Polignac number, because 111827161841 - 2¹⁴ = 111827145457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111827161847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1928054486 + ... + 1928054543.

It is an arithmetic number, because the mean of its divisors is an integer number (28920817725).

Almost surely, 2^111827161841 is an apocalyptic number.

It is an amenable number.

111827161841 is a deficient number, since it is larger than the sum of its proper divisors (3856109059).

111827161841 is an equidigital number, since it uses as much as digits as its factorization.

111827161841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856109058.

The product of its digits is 21504, while the sum is 41.

Adding to 111827161841 its reverse (148161728111), we get a palindrome (259988889952).

The spelling of 111827161841 in words is "one hundred eleven billion, eight hundred twenty-seven million, one hundred sixty-one thousand, eight hundred forty-one".