111444213545 has 24 divisors (see below), whose sum is σ = 155709211464. Its totient is φ = 76349043456.

The previous prime is 111444213539. The next prime is 111444213563. The reversal of 111444213545 is 545312444111.

It can be written as a sum of positive squares in 4 ways, for example, as 1650065641 + 109794147904 = 40621^2 + 331352^2 .

It is not a de Polignac number, because 111444213545 - 2¹⁶ = 111444148009 is a prime.

It is a super-2 number, since 2×111444213545² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61439 + ... + 476091.

It is an arithmetic number, because the mean of its divisors is an integer number (6487883811).

Almost surely, 2^111444213545 is an apocalyptic number.

It is an amenable number.

111444213545 is a deficient number, since it is larger than the sum of its proper divisors (44264997919).

111444213545 is a wasteful number, since it uses less digits than its factorization.

111444213545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415769 (or 415762 counting only the distinct ones).

The product of its digits is 38400, while the sum is 35.

Adding to 111444213545 its reverse (545312444111), we get a palindrome (656756657656).

The spelling of 111444213545 in words is "one hundred eleven billion, four hundred forty-four million, two hundred thirteen thousand, five hundred forty-five".