636159 has 8 divisors (see below), whose sum is σ = 864432. Its totient is φ = 416000.

The previous prime is 636149. The next prime is 636193. The reversal of 636159 is 951636.

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 636159 - 2¹⁵ = 603391 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 636159.

It is not an unprimeable number, because it can be changed into a prime (636109) 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, 1842 + ... + 2159.

It is an arithmetic number, because the mean of its divisors is an integer number (108054).

2⁶³⁶¹⁵⁹ is an apocalyptic number.

636159 is a deficient number, since it is larger than the sum of its proper divisors (228273).

636159 is a wasteful number, since it uses less digits than its factorization.

636159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4057.

The product of its digits is 4860, while the sum is 30.

The square root of 636159 is about 797.5957622756. The cubic root of 636159 is about 86.0046418984.

It can be divided in two parts, 636 and 159, that multiplied together give a square (101124 = 318²).

The spelling of 636159 in words is "six hundred thirty-six thousand, one hundred fifty-nine".