111444444513 has 32 divisors (see below), whose sum is σ = 172314604800. Its totient is φ = 71052271488.

The previous prime is 111444444499. The next prime is 111444444541. The reversal of 111444444513 is 315444444111.

It is not a de Polignac number, because 111444444513 - 2¹⁰ = 111444443489 is a prime.

It is a super-2 number, since 2×111444444513² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111444444583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3908653 + ... + 3937061.

It is an arithmetic number, because the mean of its divisors is an integer number (5384831400).

Almost surely, 2^111444444513 is an apocalyptic number.

It is an amenable number.

111444444513 is a deficient number, since it is larger than the sum of its proper divisors (60870160287).

111444444513 is a wasteful number, since it uses less digits than its factorization.

111444444513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34758 (or 34752 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

Adding to 111444444513 its reverse (315444444111), we get a palindrome (426888888624).

The spelling of 111444444513 in words is "one hundred eleven billion, four hundred forty-four million, four hundred forty-four thousand, five hundred thirteen".