636000064 has 28 divisors (see below), whose sum is σ = 1442358304. Its totient is φ = 272571264.

The previous prime is 636000031. The next prime is 636000103. The reversal of 636000064 is 460000636.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

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, 709374 + ... + 710269.

Almost surely, 2^636000064 is an apocalyptic number.

636000064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

636000064 is an abundant number, since it is smaller than the sum of its proper divisors (806358240).

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

636000064 is a wasteful number, since it uses less digits than its factorization.

636000064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419662 (or 1419652 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 636000064 is about 25219.0416947195. The cubic root of 636000064 is about 859.9747892375.

The spelling of 636000064 in words is "six hundred thirty-six million, sixty-four", and thus it is an aban number.