63664466438 has 16 divisors (see below), whose sum is σ = 102394082880. Its totient is φ = 29580510336.

The previous prime is 63664466431. The next prime is 63664466447. The reversal of 63664466438 is 83466446636.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63664466431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11848481 + ... + 11853852.

It is an arithmetic number, because the mean of its divisors is an integer number (6399630180).

Almost surely, 2^63664466438 is an apocalyptic number.

63664466438 is a deficient number, since it is larger than the sum of its proper divisors (38729616442).

63664466438 is a wasteful number, since it uses less digits than its factorization.

63664466438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23702431.

The product of its digits is 35831808, while the sum is 56.

The spelling of 63664466438 in words is "sixty-three billion, six hundred sixty-four million, four hundred sixty-six thousand, four hundred thirty-eight".