63664664423 has 16 divisors (see below), whose sum is σ = 64353009600. Its totient is φ = 62980483584.

The previous prime is 63664664419. The next prime is 63664664449. The reversal of 63664664423 is 32446646636.

It is a cyclic number.

It is not a de Polignac number, because 63664664423 - 2² = 63664664419 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 (63664669423) 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 15 ways as a sum of consecutive naturals, for example, 64765190 + ... + 64766172.

It is an arithmetic number, because the mean of its divisors is an integer number (4022063100).

Almost surely, 2^63664664423 is an apocalyptic number.

63664664423 is a deficient number, since it is larger than the sum of its proper divisors (688345177).

63664664423 is a wasteful number, since it uses less digits than its factorization.

63664664423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458.

The product of its digits is 8957952, while the sum is 50.

The spelling of 63664664423 in words is "sixty-three billion, six hundred sixty-four million, six hundred sixty-four thousand, four hundred twenty-three".