5643616621 has 8 divisors (see below), whose sum is σ = 5769331200. Its totient is φ = 5518904160.

The previous prime is 5643616541. The next prime is 5643616639. The reversal of 5643616621 is 1266163465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5643616621 - 2¹³ = 5643608429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5643616661) 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, 239136 + ... + 261673.

It is an arithmetic number, because the mean of its divisors is an integer number (721166400).

Almost surely, 2^5643616621 is an apocalyptic number.

It is an amenable number.

5643616621 is a deficient number, since it is larger than the sum of its proper divisors (125714579).

5643616621 is a wasteful number, since it uses less digits than its factorization.

5643616621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501059.

The product of its digits is 155520, while the sum is 40.

The square root of 5643616621 is about 75124.0082862995. The cubic root of 5643616621 is about 1780.4064868279.

The spelling of 5643616621 in words is "five billion, six hundred forty-three million, six hundred sixteen thousand, six hundred twenty-one".