11111818273 has 4 divisors (see below), whose sum is σ = 11765454660. Its totient is φ = 10458181888.

The previous prime is 11111818271. The next prime is 11111818313. The reversal of 11111818273 is 37281811111.

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 4868131984 + 6243686289 = 69772^2 + 79017^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111818273 - 2¹ = 11111818271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111818271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326818168 + ... + 326818201.

It is an arithmetic number, because the mean of its divisors is an integer number (2941363665).

Almost surely, 2^11111818273 is an apocalyptic number.

It is an amenable number.

11111818273 is a deficient number, since it is larger than the sum of its proper divisors (653636387).

11111818273 is an equidigital number, since it uses as much as digits as its factorization.

11111818273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653636386.

The product of its digits is 2688, while the sum is 34.

The spelling of 11111818273 in words is "eleven billion, one hundred eleven million, eight hundred eighteen thousand, two hundred seventy-three".