11115311105545 has 16 divisors (see below), whose sum is σ = 13638215098368. Its totient is φ = 8694100175040.

The previous prime is 11115311105519. The next prime is 11115311105567. The reversal of 11115311105545 is 54550111351111.

It is not a de Polignac number, because 11115311105545 - 2⁷ = 11115311105417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11115311105545.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109061769 + ... + 109163638.

It is an arithmetic number, because the mean of its divisors is an integer number (852388443648).

Almost surely, 2^{11115311105545} is an apocalyptic number.

It is an amenable number.

11115311105545 is a deficient number, since it is larger than the sum of its proper divisors (2522903992823).

11115311105545 is a wasteful number, since it uses less digits than its factorization.

11115311105545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218225640.

The product of its (nonzero) digits is 7500, while the sum is 34.

Adding to 11115311105545 its reverse (54550111351111), we get a palindrome (65665422456656).

The spelling of 11115311105545 in words is "eleven trillion, one hundred fifteen billion, three hundred eleven million, one hundred five thousand, five hundred forty-five".