5421544640 has 56 divisors (see below), whose sum is σ = 12939796320. Its totient is φ = 2163621888.

The previous prime is 5421544589. The next prime is 5421544649. The reversal of 5421544640 is 464451245.

It is a self number, because there is not a number n which added to its sum of digits gives 5421544640.

It is not an unprimeable number, because it can be changed into a prime (5421544649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121184 + ... + 159776.

Almost surely, 2^5421544640 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 5421544640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6469898160).

5421544640 is an abundant number, since it is smaller than the sum of its proper divisors (7518251680).

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

5421544640 is a wasteful number, since it uses less digits than its factorization.

5421544640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39049 (or 39039 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

The square root of 5421544640 is about 73631.1390649364. The cubic root of 5421544640 is about 1756.7407656733.

Adding to 5421544640 its reverse (464451245), we get a palindrome (5885995885).

The spelling of 5421544640 in words is "five billion, four hundred twenty-one million, five hundred forty-four thousand, six hundred forty".