64421211664005 has 32 divisors (see below), whose sum is σ = 118658632230144. Its totient is φ = 29234735463936.

The previous prime is 64421211663967. The next prime is 64421211664079. The reversal of 64421211664005 is 50046611212446.

It is a happy number.

It is not a de Polignac number, because 64421211664005 - 2¹⁴ = 64421211647621 is a prime.

It is a super-2 number, since 2×64421211664005² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2239165722 + ... + 2239194491.

It is an arithmetic number, because the mean of its divisors is an integer number (3708082257192).

Almost surely, 2^{64421211664005} is an apocalyptic number.

It is an amenable number.

64421211664005 is a deficient number, since it is larger than the sum of its proper divisors (54237420566139).

64421211664005 is a wasteful number, since it uses less digits than its factorization.

64421211664005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4478360365.

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 64421211664005 in words is "sixty-four trillion, four hundred twenty-one billion, two hundred eleven million, six hundred sixty-four thousand, five".