5638404653 has 4 divisors (see below), whose sum is σ = 6443891040. Its totient is φ = 4832918268.

The previous prime is 5638404623. The next prime is 5638404661. The reversal of 5638404653 is 3564048365.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5638404653 - 2¹⁰ = 5638403629 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 (5638404623) 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, 402743183 + ... + 402743196.

It is an arithmetic number, because the mean of its divisors is an integer number (1610972760).

Almost surely, 2^5638404653 is an apocalyptic number.

It is an amenable number.

5638404653 is a deficient number, since it is larger than the sum of its proper divisors (805486387).

5638404653 is an equidigital number, since it uses as much as digits as its factorization.

5638404653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805486386.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The square root of 5638404653 is about 75089.3111767580. The cubic root of 5638404653 is about 1779.8582402991.

The spelling of 5638404653 in words is "five billion, six hundred thirty-eight million, four hundred four thousand, six hundred fifty-three".