228544681777 has 4 divisors (see below), whose sum is σ = 229103471140. Its totient is φ = 227985892416.

The previous prime is 228544681769. The next prime is 228544681793. The reversal of 228544681777 is 777186445822.

228544681777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 172660194576 + 55884487201 = 415524^2 + 236399^2 .

It is a cyclic number.

It is not a de Polignac number, because 228544681777 - 2³ = 228544681769 is a prime.

It is a super-3 number, since 3×228544681777³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228544685777) 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, 279394068 + ... + 279394885.

It is an arithmetic number, because the mean of its divisors is an integer number (57275867785).

Almost surely, 2^228544681777 is an apocalyptic number.

It is an amenable number.

228544681777 is a deficient number, since it is larger than the sum of its proper divisors (558789363).

228544681777 is an equidigital number, since it uses as much as digits as its factorization.

228544681777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558789362.

The product of its digits is 42147840, while the sum is 61.

The spelling of 228544681777 in words is "two hundred twenty-eight billion, five hundred forty-four million, six hundred eighty-one thousand, seven hundred seventy-seven".