4453663643 has 16 divisors (see below), whose sum is σ = 5303963616. Its totient is φ = 3686135040.

The previous prime is 4453663637. The next prime is 4453663649. The reversal of 4453663643 is 3463663544.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4453663637) and next prime (4453663649).

It is a cyclic number.

It is not a de Polignac number, because 4453663643 - 2¹⁸ = 4453401499 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4453663594 and 4453663603.

It is not an unprimeable number, because it can be changed into a prime (4453663649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202880 + ... + 223757.

It is an arithmetic number, because the mean of its divisors is an integer number (331497726).

Almost surely, 2^4453663643 is an apocalyptic number.

4453663643 is a deficient number, since it is larger than the sum of its proper divisors (850299973).

4453663643 is a wasteful number, since it uses less digits than its factorization.

4453663643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426734.

The product of its digits is 1866240, while the sum is 44.

The square root of 4453663643 is about 66735.7748362900. The cubic root of 4453663643 is about 1645.2774226851.

Subtracting from 4453663643 its reverse (3463663544), we obtain a palindrome (990000099).

The spelling of 4453663643 in words is "four billion, four hundred fifty-three million, six hundred sixty-three thousand, six hundred forty-three".