636604423 has 24 divisors (see below), whose sum is σ = 844430832. Its totient is φ = 474050304.

The previous prime is 636604393. The next prime is 636604429. The reversal of 636604423 is 324406636.

It is not a de Polignac number, because 636604423 - 2¹⁷ = 636473351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636604429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18565 + ... + 40222.

It is an arithmetic number, because the mean of its divisors is an integer number (35184618).

Almost surely, 2^636604423 is an apocalyptic number.

636604423 is a deficient number, since it is larger than the sum of its proper divisors (207826409).

636604423 is a wasteful number, since it uses less digits than its factorization.

636604423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58831 (or 58824 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 34.

The square root of 636604423 is about 25231.0210455304. The cubic root of 636604423 is about 860.2470999884.

The spelling of 636604423 in words is "six hundred thirty-six million, six hundred four thousand, four hundred twenty-three".