111540555513 has 12 divisors (see below), whose sum is σ = 161127073380. Its totient is φ = 74354399136.

The previous prime is 111540555491. The next prime is 111540555527. The reversal of 111540555513 is 315555045111.

111540555513 is a `hidden beast` number, since 1 + 1 + 1 + 54 + 0 + 55 + 551 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 62899135209 + 48641420304 = 250797^2 + 220548^2 .

It is a de Polignac number, because none of the positive numbers 2^k-111540555513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111540555713) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 377778 + ... + 604811.

It is an arithmetic number, because the mean of its divisors is an integer number (13427256115).

Almost surely, 2^111540555513 is an apocalyptic number.

It is an amenable number.

111540555513 is a deficient number, since it is larger than the sum of its proper divisors (49586517867).

111540555513 is a wasteful number, since it uses less digits than its factorization.

111540555513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995208 (or 995205 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 36.

The spelling of 111540555513 in words is "one hundred eleven billion, five hundred forty million, five hundred fifty-five thousand, five hundred thirteen".