5643512420 has 96 divisors (see below), whose sum is σ = 14639186688. Its totient is φ = 1779604992.

The previous prime is 5643512419. The next prime is 5643512447. The reversal of 5643512420 is 242153465.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 509582 + ... + 520538.

It is an arithmetic number, because the mean of its divisors is an integer number (152491528).

Almost surely, 2^5643512420 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 5643512420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7319593344).

5643512420 is an abundant number, since it is smaller than the sum of its proper divisors (8995674268).

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

5643512420 is a wasteful number, since it uses less digits than its factorization.

5643512420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11269 (or 11267 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 5643512420 is about 75123.3147564722. The cubic root of 5643512420 is about 1780.3955292398.

Adding to 5643512420 its reverse (242153465), we get a palindrome (5885665885).

The spelling of 5643512420 in words is "five billion, six hundred forty-three million, five hundred twelve thousand, four hundred twenty".