5644384571646 has 72 divisors (see below), whose sum is σ = 12752663231880. Its totient is φ = 1804064309280.

The previous prime is 5644384571627. The next prime is 5644384571647. The reversal of 5644384571646 is 6461754834465.

5644384571646 is a `hidden beast` number, since 5 + 6 + 44 + 384 + 57 + 164 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5644384571647) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 388681 + ... + 3382283.

It is an arithmetic number, because the mean of its divisors is an integer number (177120322665).

Almost surely, 2^{5644384571646} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5644384571646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6376331615940).

5644384571646 is an abundant number, since it is smaller than the sum of its proper divisors (7108278660234).

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

5644384571646 is a wasteful number, since it uses less digits than its factorization.

5644384571646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993782 (or 2993748 counting only the distinct ones).

The product of its digits is 232243200, while the sum is 63.

The spelling of 5644384571646 in words is "five trillion, six hundred forty-four billion, three hundred eighty-four million, five hundred seventy-one thousand, six hundred forty-six".