5945643664 has 45 divisors (see below), whose sum is σ = 11862210171. Its totient is φ = 2886923520.

The previous prime is 5945643661. The next prime is 5945643673. The reversal of 5945643664 is 4663465495.

The square root of 5945643664 is 77108.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 321843600 + 5623800064 = 17940^2 + 74992^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5945643661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11411724 + ... + 11412244.

Almost surely, 2^5945643664 is an apocalyptic number.

5945643664 is the 77108-th square number.

It is an amenable number.

5945643664 is a deficient number, since it is larger than the sum of its proper divisors (5916566507).

5945643664 is an frugal number, since it uses more digits than its factorization.

5945643664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124 (or 560 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 52.

The cubic root of 5945643664 is about 1811.6166039872.

The spelling of 5945643664 in words is "five billion, nine hundred forty-five million, six hundred forty-three thousand, six hundred sixty-four".