663843531463 has 4 divisors (see below), whose sum is σ = 758678321680. Its totient is φ = 569008741248.

The previous prime is 663843531401. The next prime is 663843531469. The reversal of 663843531463 is 364135348366.

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 663843531463 - 2¹⁷ = 663843400391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663843531463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663843531469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47417395098 + ... + 47417395111.

It is an arithmetic number, because the mean of its divisors is an integer number (189669580420).

Almost surely, 2^663843531463 is an apocalyptic number.

663843531463 is a deficient number, since it is larger than the sum of its proper divisors (94834790217).

663843531463 is an equidigital number, since it uses as much as digits as its factorization.

663843531463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94834790216.

The product of its digits is 11197440, while the sum is 52.

The spelling of 663843531463 in words is "six hundred sixty-three billion, eight hundred forty-three million, five hundred thirty-one thousand, four hundred sixty-three".