43243453501663 has 4 divisors (see below), whose sum is σ = 44249115211048. Its totient is φ = 42237791792280.

The previous prime is 43243453501607. The next prime is 43243453501669. The reversal of 43243453501663 is 36610535434234.

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 43243453501663 - 2⁹ = 43243453501151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43243453501669) 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, 502830854628 + ... + 502830854713.

It is an arithmetic number, because the mean of its divisors is an integer number (11062278802762).

Almost surely, 2^{43243453501663} is an apocalyptic number.

43243453501663 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

43243453501663 is a deficient number, since it is larger than the sum of its proper divisors (1005661709385).

43243453501663 is a wasteful number, since it uses less digits than its factorization.

43243453501663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005661709384.

The product of its (nonzero) digits is 9331200, while the sum is 49.

Adding to 43243453501663 its reverse (36610535434234), we get a palindrome (79853988935897).

The spelling of 43243453501663 in words is "forty-three trillion, two hundred forty-three billion, four hundred fifty-three million, five hundred one thousand, six hundred sixty-three".