4223516645 has 16 divisors (see below), whose sum is σ = 5245086960. Its totient is φ = 3260995584.

The previous prime is 4223516617. The next prime is 4223516653. The reversal of 4223516645 is 5466153224.

It can be written as a sum of positive squares in 8 ways, for example, as 303003649 + 3920512996 = 17407^2 + 62614^2 .

It is a cyclic number.

It is not a de Polignac number, because 4223516645 - 2⁸ = 4223516389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4223516599 and 4223516608.

It is a congruent number.

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, 520439 + ... + 528491.

It is an arithmetic number, because the mean of its divisors is an integer number (327817935).

Almost surely, 2^4223516645 is an apocalyptic number.

It is an amenable number.

4223516645 is a deficient number, since it is larger than the sum of its proper divisors (1021570315).

4223516645 is a wasteful number, since it uses less digits than its factorization.

4223516645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11704.

The product of its digits is 172800, while the sum is 38.

The square root of 4223516645 is about 64988.5885752260. The cubic root of 4223516645 is about 1616.4343470089.

Adding to 4223516645 its reverse (5466153224), we get a palindrome (9689669869).

The spelling of 4223516645 in words is "four billion, two hundred twenty-three million, five hundred sixteen thousand, six hundred forty-five".