63664246637 has 8 divisors (see below), whose sum is σ = 67229108160. Its totient is φ = 60120796320.

The previous prime is 63664246619. The next prime is 63664246651. The reversal of 63664246637 is 73664246636.

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

It is a cyclic number.

It is not a de Polignac number, because 63664246637 - 2⁶ = 63664246573 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 (63664246697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5346689 + ... + 5358582.

It is an arithmetic number, because the mean of its divisors is an integer number (8403638520).

Almost surely, 2^63664246637 is an apocalyptic number.

It is an amenable number.

63664246637 is a deficient number, since it is larger than the sum of its proper divisors (3564861523).

63664246637 is a wasteful number, since it uses less digits than its factorization.

63664246637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10705603.

The product of its digits is 15676416, while the sum is 53.

Subtracting 63664246637 from its reverse (73664246636), we obtain a palindrome (9999999999).

The spelling of 63664246637 in words is "sixty-three billion, six hundred sixty-four million, two hundred forty-six thousand, six hundred thirty-seven".