63449641663 has 4 divisors (see below), whose sum is σ = 63450146248. Its totient is φ = 63449137080.

The previous prime is 63449641657. The next prime is 63449641681. The reversal of 63449641663 is 36614694436.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63449641663 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 63449641663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63449611663) 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, 104848 + ... + 371338.

It is an arithmetic number, because the mean of its divisors is an integer number (15862536562).

Almost surely, 2^63449641663 is an apocalyptic number.

63449641663 is a deficient number, since it is larger than the sum of its proper divisors (504585).

63449641663 is a wasteful number, since it uses less digits than its factorization.

63449641663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504584.

The product of its digits is 6718464, while the sum is 52.

The spelling of 63449641663 in words is "sixty-three billion, four hundred forty-nine million, six hundred forty-one thousand, six hundred sixty-three".