5644531440 has 160 divisors (see below), whose sum is σ = 19495895040. Its totient is φ = 1501058304.

The previous prime is 5644531433. The next prime is 5644531447. The reversal of 5644531440 is 441354465.

5644531440 is a `hidden beast` number, since 5 + 64 + 453 + 144 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (5644531433) and next prime (5644531447).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 5644531395 and 5644531404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5644531447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 823869 + ... + 830691.

It is an arithmetic number, because the mean of its divisors is an integer number (121849344).

Almost surely, 2^5644531440 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 5644531440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9747947520).

5644531440 is an abundant number, since it is smaller than the sum of its proper divisors (13851363600).

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

5644531440 is a wasteful number, since it uses less digits than its factorization.

5644531440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7228 (or 7216 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 5644531440 is about 75130.0967655440. The cubic root of 5644531440 is about 1780.5026817441.

The spelling of 5644531440 in words is "five billion, six hundred forty-four million, five hundred thirty-one thousand, four hundred forty".