636663145 has 8 divisors (see below), whose sum is σ = 775399104. Its totient is φ = 501728304.

The previous prime is 636663121. The next prime is 636663163. The reversal of 636663145 is 541366636.

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 636663145 - 2⁵ = 636663113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 636663098 and 636663107.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 949909 + ... + 950578.

It is an arithmetic number, because the mean of its divisors is an integer number (96924888).

Almost surely, 2^636663145 is an apocalyptic number.

It is an amenable number.

636663145 is a deficient number, since it is larger than the sum of its proper divisors (138735959).

636663145 is a wasteful number, since it uses less digits than its factorization.

636663145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900559.

The product of its digits is 233280, while the sum is 40.

The square root of 636663145 is about 25232.1847052529. The cubic root of 636663145 is about 860.2735496303.

The spelling of 636663145 in words is "six hundred thirty-six million, six hundred sixty-three thousand, one hundred forty-five".