5644909440 has 512 divisors, whose sum is σ = 20976912000. Its totient is φ = 1451188224.

The previous prime is 5644909411. The next prime is 5644909447. The reversal of 5644909440 is 449094465.

5644909440 is a `hidden beast` number, since 564 + 49 + 0 + 9 + 4 + 40 = 666.

It is a super-2 number, since 2×5644909440² = 63730005171602227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5644909447) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51788106 + ... + 51788214.

Almost surely, 2^5644909440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5644909440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10488456000).

5644909440 is an abundant number, since it is smaller than the sum of its proper divisors (15332002560).

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

5644909440 is an equidigital number, since it uses as much as digits as its factorization.

5644909440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 5644909440 is about 75132.6123597469. The cubic root of 5644909440 is about 1780.5424261113.

The spelling of 5644909440 in words is "five billion, six hundred forty-four million, nine hundred nine thousand, four hundred forty".