636620545 has 8 divisors (see below), whose sum is σ = 833394240. Its totient is φ = 462996720.

The previous prime is 636620531. The next prime is 636620563. The reversal of 636620545 is 545026636.

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

It is not a de Polignac number, because 636620545 - 2¹¹ = 636618497 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 5787405 + ... + 5787514.

It is an arithmetic number, because the mean of its divisors is an integer number (104174280).

Almost surely, 2^636620545 is an apocalyptic number.

It is an amenable number.

636620545 is a deficient number, since it is larger than the sum of its proper divisors (196773695).

636620545 is a wasteful number, since it uses less digits than its factorization.

636620545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11574935.

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 636620545 is about 25231.3405311727. The cubic root of 636620545 is about 860.2543618432.

The spelling of 636620545 in words is "six hundred thirty-six million, six hundred twenty thousand, five hundred forty-five".