636552216550539 has 12 divisors (see below), whose sum is σ = 919481976117016. Its totient is φ = 424359992064672.

The previous prime is 636552216550387. The next prime is 636552216550589. The reversal of 636552216550539 is 935055612255636.

636552216550539 is a `hidden beast` number, since 6 + 3 + 6 + 5 + 5 + 2 + 21 + 6 + 550 + 53 + 9 = 666.

It is not a de Polignac number, because 636552216550539 - 2²⁴ = 636552199773323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636552216550589) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 678863989 + ... + 679801014.

Almost surely, 2^{636552216550539} is an apocalyptic number.

636552216550539 is a deficient number, since it is larger than the sum of its proper divisors (282929759566477).

636552216550539 is a wasteful number, since it uses less digits than its factorization.

636552216550539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358717066 (or 1358717063 counting only the distinct ones).

The product of its (nonzero) digits is 218700000, while the sum is 63.

The spelling of 636552216550539 in words is "six hundred thirty-six trillion, five hundred fifty-two billion, two hundred sixteen million, five hundred fifty thousand, five hundred thirty-nine".