111145315553 has 4 divisors (see below), whose sum is σ = 111402002628. Its totient is φ = 110888628480.

The previous prime is 111145315549. The next prime is 111145315559. The reversal of 111145315553 is 355513541111.

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 19162311184 + 91983004369 = 138428^2 + 303287^2 .

It is a cyclic number.

It is not a de Polignac number, because 111145315553 - 2² = 111145315549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111145315559) 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 3 ways as a sum of consecutive naturals, for example, 128342888 + ... + 128343753.

It is an arithmetic number, because the mean of its divisors is an integer number (27850500657).

Almost surely, 2^111145315553 is an apocalyptic number.

It is an amenable number.

111145315553 is a deficient number, since it is larger than the sum of its proper divisors (256687075).

111145315553 is an equidigital number, since it uses as much as digits as its factorization.

111145315553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256687074.

The product of its digits is 22500, while the sum is 35.

Adding to 111145315553 its reverse (355513541111), we get a palindrome (466658856664).

The spelling of 111145315553 in words is "one hundred eleven billion, one hundred forty-five million, three hundred fifteen thousand, five hundred fifty-three".