5643911280 has 80 divisors (see below), whose sum is σ = 19995577344. Its totient is φ = 1290036480.

The previous prime is 5643911261. The next prime is 5643911309. The reversal of 5643911280 is 821193465.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×5643911280² = 63707469073022476800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1678056 + ... + 1681415.

Almost surely, 2^5643911280 is an apocalyptic number.

It is an amenable number.

5643911280 is an abundant number, since it is smaller than the sum of its proper divisors (14351666064).

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

5643911280 is a wasteful number, since it uses less digits than its factorization.

5643911280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359494 (or 3359488 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 5643911280 is about 75125.9694113826. The cubic root of 5643911280 is about 1780.4374719036.

The spelling of 5643911280 in words is "five billion, six hundred forty-three million, nine hundred eleven thousand, two hundred eighty".