5638943653 has 8 divisors (see below), whose sum is σ = 6445323072. Its totient is φ = 4832768256.

The previous prime is 5638943641. The next prime is 5638943669. The reversal of 5638943653 is 3563498365.

It is a happy number.

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 5638943653 - 2⁵ = 5638943621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5638943653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5638943693) 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, 13701 + ... + 107077.

It is an arithmetic number, because the mean of its divisors is an integer number (805665384).

Almost surely, 2^5638943653 is an apocalyptic number.

It is an amenable number.

5638943653 is a deficient number, since it is larger than the sum of its proper divisors (806379419).

5638943653 is an equidigital number, since it uses as much as digits as its factorization.

5638943653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102011.

The product of its digits is 6998400, while the sum is 52.

The square root of 5638943653 is about 75092.9001504137. The cubic root of 5638943653 is about 1779.9149533284.

The spelling of 5638943653 in words is "five billion, six hundred thirty-eight million, nine hundred forty-three thousand, six hundred fifty-three".