636505068 has 18 divisors (see below), whose sum is σ = 1485382444. Its totient is φ = 212139224.

The previous prime is 636504983. The next prime is 636505097. The reversal of 636505068 is 860505636.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83755 + ... + 91037.

Almost surely, 2^636505068 is an apocalyptic number.

It is an amenable number.

636505068 is an abundant number, since it is smaller than the sum of its proper divisors (848877376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

636505068 is an frugal number, since it uses more digits than its factorization.

636505068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14573 (or 7288 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 636505068 is about 25229.0520630483. The cubic root of 636505068 is about 860.2023446718.

The spelling of 636505068 in words is "six hundred thirty-six million, five hundred five thousand, sixty-eight".