636626242 has 8 divisors (see below), whose sum is σ = 1091359296. Its totient is φ = 272839812.

The previous prime is 636626213. The next prime is 636626279. The reversal of 636626242 is 242626636.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22736638 + ... + 22736665.

It is an arithmetic number, because the mean of its divisors is an integer number (136419912).

Almost surely, 2^636626242 is an apocalyptic number.

636626242 is a deficient number, since it is larger than the sum of its proper divisors (454733054).

636626242 is a wasteful number, since it uses less digits than its factorization.

636626242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45473312.

The product of its digits is 124416, while the sum is 37.

The square root of 636626242 is about 25231.4534262297. The cubic root of 636626242 is about 860.2569279215.

The spelling of 636626242 in words is "six hundred thirty-six million, six hundred twenty-six thousand, two hundred forty-two".