636672959 has 16 divisors (see below), whose sum is σ = 720652800. Its totient is φ = 558065376.

The previous prime is 636672937. The next prime is 636672961. The reversal of 636672959 is 959276636.

It is not a de Polignac number, because 636672959 - 2¹² = 636668863 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 636672959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636642959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33902 + ... + 49220.

It is an arithmetic number, because the mean of its divisors is an integer number (45040800).

Almost surely, 2^636672959 is an apocalyptic number.

636672959 is a deficient number, since it is larger than the sum of its proper divisors (83979841).

636672959 is a wasteful number, since it uses less digits than its factorization.

636672959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15494.

The product of its digits is 3674160, while the sum is 53.

The square root of 636672959 is about 25232.3791783494. The cubic root of 636672959 is about 860.2779699067.

The spelling of 636672959 in words is "six hundred thirty-six million, six hundred seventy-two thousand, nine hundred fifty-nine".