636343166064 has 40 divisors (see below), whose sum is σ = 1646205199120. Its totient is φ = 211815203328.

The previous prime is 636343166059. The next prime is 636343166089. The reversal of 636343166064 is 460661343636.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9315157 + ... + 9383220.

It is an arithmetic number, because the mean of its divisors is an integer number (41155129978).

Almost surely, 2^636343166064 is an apocalyptic number.

It is an amenable number.

636343166064 is an abundant number, since it is smaller than the sum of its proper divisors (1009862033056).

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

636343166064 is a wasteful number, since it uses less digits than its factorization.

636343166064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18699097 (or 18699091 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 48.

The spelling of 636343166064 in words is "six hundred thirty-six billion, three hundred forty-three million, one hundred sixty-six thousand, sixty-four".