63491837648063 has 4 divisors (see below), whose sum is σ = 69263822888808. Its totient is φ = 57719852407320.

The previous prime is 63491837648047. The next prime is 63491837648081. The reversal of 63491837648063 is 36084673819436.

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 63491837648063 - 2⁴ = 63491837648047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63491837647984 and 63491837648002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63491837648023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2885992620356 + ... + 2885992620377.

It is an arithmetic number, because the mean of its divisors is an integer number (17315955722202).

Almost surely, 2^{63491837648063} is an apocalyptic number.

63491837648063 is a deficient number, since it is larger than the sum of its proper divisors (5771985240745).

63491837648063 is a wasteful number, since it uses less digits than its factorization.

63491837648063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5771985240744.

The product of its (nonzero) digits is 376233984, while the sum is 68.

The spelling of 63491837648063 in words is "sixty-three trillion, four hundred ninety-one billion, eight hundred thirty-seven million, six hundred forty-eight thousand, sixty-three".