5643665123 has 8 divisors (see below), whose sum is σ = 5661490800. Its totient is φ = 5625855648.

The previous prime is 5643665087. The next prime is 5643665141. The reversal of 5643665123 is 3215663465.

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 5643665123 - 2¹² = 5643661027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5643665023) 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, 1412813 + ... + 1416801.

It is an arithmetic number, because the mean of its divisors is an integer number (707686350).

Almost surely, 2^5643665123 is an apocalyptic number.

5643665123 is a deficient number, since it is larger than the sum of its proper divisors (17825677).

5643665123 is a wasteful number, since it uses less digits than its factorization.

5643665123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8101.

The product of its digits is 388800, while the sum is 41.

The square root of 5643665123 is about 75124.3310985196. The cubic root of 5643665123 is about 1780.4115871642.

The spelling of 5643665123 in words is "five billion, six hundred forty-three million, six hundred sixty-five thousand, one hundred twenty-three".