5643400664 has 16 divisors (see below), whose sum is σ = 11543319720. Its totient is φ = 2565182080.

The previous prime is 5643400663. The next prime is 5643400703. The reversal of 5643400664 is 4660043465.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5643400663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32064689 + ... + 32064864.

Almost surely, 2^5643400664 is an apocalyptic number.

It is an amenable number.

5643400664 is an abundant number, since it is smaller than the sum of its proper divisors (5899919056).

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

5643400664 is a wasteful number, since it uses less digits than its factorization.

5643400664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64129570 (or 64129566 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 38.

The square root of 5643400664 is about 75122.5709357714. The cubic root of 5643400664 is about 1780.3837770318.

The spelling of 5643400664 in words is "five billion, six hundred forty-three million, four hundred thousand, six hundred sixty-four".