636145886 has 8 divisors (see below), whose sum is σ = 956290104. Its totient is φ = 317382520.

The previous prime is 636145883. The next prime is 636145901. The reversal of 636145886 is 688541636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 636145886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636145883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344060 + ... + 345903.

It is an arithmetic number, because the mean of its divisors is an integer number (119536263).

Almost surely, 2^636145886 is an apocalyptic number.

636145886 is a deficient number, since it is larger than the sum of its proper divisors (320144218).

636145886 is a wasteful number, since it uses less digits than its factorization.

636145886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690426.

The product of its digits is 829440, while the sum is 47.

The square root of 636145886 is about 25221.9326380831. The cubic root of 636145886 is about 860.0405091789.

The spelling of 636145886 in words is "six hundred thirty-six million, one hundred forty-five thousand, eight hundred eighty-six".