63644421306463 has 8 divisors (see below), whose sum is σ = 64050003495680. Its totient is φ = 63238841696160.

The previous prime is 63644421306457. The next prime is 63644421306467. The reversal of 63644421306463 is 36460312444636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63644421306463 is a prime.

It is a super-2 number, since 2×63644421306463² (a number of 28 digits) contains 22 as substring.

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 63644421306463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63644421306467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84984793 + ... + 85730413.

It is an arithmetic number, because the mean of its divisors is an integer number (8006250436960).

Almost surely, 2^{63644421306463} is an apocalyptic number.

63644421306463 is a deficient number, since it is larger than the sum of its proper divisors (405582189217).

63644421306463 is a wasteful number, since it uses less digits than its factorization.

63644421306463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289457.

The product of its (nonzero) digits is 17915904, while the sum is 52.

The spelling of 63644421306463 in words is "sixty-three trillion, six hundred forty-four billion, four hundred twenty-one million, three hundred six thousand, four hundred sixty-three".