64440555504446 has 32 divisors (see below), whose sum is σ = 110140867411200. Its totient is φ = 27990137380480.

The previous prime is 64440555504431. The next prime is 64440555504487.

64440555504446 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 64440555504391 and 64440555504400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61973531 + ... + 63004758.

It is an arithmetic number, because the mean of its divisors is an integer number (3441902106600).

Almost surely, 2^{64440555504446} is an apocalyptic number.

64440555504446 is a deficient number, since it is larger than the sum of its proper divisors (45700311906754).

64440555504446 is a wasteful number, since it uses less digits than its factorization.

64440555504446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124979344.

The product of its (nonzero) digits is 92160000, while the sum is 56.

The spelling of 64440555504446 in words is "sixty-four trillion, four hundred forty billion, five hundred fifty-five million, five hundred four thousand, four hundred forty-six".