64644264213205 has 8 divisors (see below), whose sum is σ = 77583266665632. Its totient is φ = 51708644964048.

The previous prime is 64644264213203. The next prime is 64644264213211. The reversal of 64644264213205 is 50231246244646.

It is a happy number.

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 64644264213205 - 2¹ = 64644264213203 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 (64644264213203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 845758779 + ... + 845835208.

It is an arithmetic number, because the mean of its divisors is an integer number (9697908333204).

Almost surely, 2^{64644264213205} is an apocalyptic number.

It is an amenable number.

64644264213205 is a deficient number, since it is larger than the sum of its proper divisors (12939002452427).

64644264213205 is a wasteful number, since it uses less digits than its factorization.

64644264213205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691601635.

The product of its (nonzero) digits is 6635520, while the sum is 49.

The spelling of 64644264213205 in words is "sixty-four trillion, six hundred forty-four billion, two hundred sixty-four million, two hundred thirteen thousand, two hundred five".