636428408416 has 24 divisors (see below), whose sum is σ = 1257626321280. Its totient is φ = 317031247488.

The previous prime is 636428408401. The next prime is 636428408419. The reversal of 636428408416 is 614804824636.

It is a super-3 number, since 3×636428408416³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636428408419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36958656 + ... + 36975871.

It is an arithmetic number, because the mean of its divisors is an integer number (52401096720).

Almost surely, 2^636428408416 is an apocalyptic number.

It is an amenable number.

636428408416 is a deficient number, since it is larger than the sum of its proper divisors (621197912864).

636428408416 is a wasteful number, since it uses less digits than its factorization.

636428408416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73934806 (or 73934798 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 52.

The spelling of 636428408416 in words is "six hundred thirty-six billion, four hundred twenty-eight million, four hundred eight thousand, four hundred sixteen".