5645719044 has 81 divisors (see below), whose sum is σ = 16610387157. Its totient is φ = 1612160928.

The previous prime is 5645718997. The next prime is 5645719063. The reversal of 5645719044 is 4409175465.

The square root of 5645719044 is 75138.

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

5645719044 is a `hidden beast` number, since 5 + 6 + 457 + 190 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5334549444 + 311169600 = 73038^2 + 17640^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3154902 + ... + 3156690.

Almost surely, 2^5645719044 is an apocalyptic number.

5645719044 is the 75138-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5645719044

5645719044 is an abundant number, since it is smaller than the sum of its proper divisors (10964668113).

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

5645719044 is a wasteful number, since it uses less digits than its factorization.

5645719044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3602 (or 1801 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The cubic root of 5645719044 is about 1780.6275450062.

The spelling of 5645719044 in words is "five billion, six hundred forty-five million, seven hundred nineteen thousand, forty-four".