4351663643 has 4 divisors (see below), whose sum is σ = 4501721040. Its totient is φ = 4201606248.

The previous prime is 4351663637. The next prime is 4351663681. The reversal of 4351663643 is 3463661534.

It is a happy number.

4351663643 is digitally balanced in base 3, 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 is a cyclic number.

It is not a de Polignac number, because 4351663643 - 2⁶ = 4351663579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4351663643.

It is not an unprimeable number, because it can be changed into a prime (4351663243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75028655 + ... + 75028712.

It is an arithmetic number, because the mean of its divisors is an integer number (1125430260).

Almost surely, 2^4351663643 is an apocalyptic number.

4351663643 is a deficient number, since it is larger than the sum of its proper divisors (150057397).

4351663643 is a wasteful number, since it uses less digits than its factorization.

4351663643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150057396.

The product of its digits is 466560, while the sum is 41.

The square root of 4351663643 is about 65967.1406307716. The cubic root of 4351663643 is about 1632.6199780024.

The spelling of 4351663643 in words is "four billion, three hundred fifty-one million, six hundred sixty-three thousand, six hundred forty-three".