64544103640326 has 32 divisors (see below), whose sum is σ = 131895268554240. Its totient is φ = 21047277832416.

The previous prime is 64544103640321. The next prime is 64544103640369. The reversal of 64544103640326 is 62304630144546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64544103640321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51904981 + ... + 53133936.

It is an arithmetic number, because the mean of its divisors is an integer number (4121727142320).

Almost surely, 2^{64544103640326} is an apocalyptic number.

64544103640326 is an abundant number, since it is smaller than the sum of its proper divisors (67351164913914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64544103640326 is a wasteful number, since it uses less digits than its factorization.

64544103640326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105041148.

The product of its (nonzero) digits is 4976640, while the sum is 48.

The spelling of 64544103640326 in words is "sixty-four trillion, five hundred forty-four billion, one hundred three million, six hundred forty thousand, three hundred twenty-six".