636632002404020 has 72 divisors (see below), whose sum is σ = 1558368451170720. Its totient is φ = 217829279680320.

The previous prime is 636632002403963. The next prime is 636632002404029. The reversal of 636632002404020 is 20404200236636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636632002404029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 661050890 + ... + 662013249.

It is an arithmetic number, because the mean of its divisors is an integer number (21644006266260).

Almost surely, 2^{636632002404020} is an apocalyptic number.

It is an amenable number.

636632002404020 is an abundant number, since it is smaller than the sum of its proper divisors (921736448766700).

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

636632002404020 is a wasteful number, since it uses less digits than its factorization.

636632002404020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323064653 (or 1323064644 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 38.

The spelling of 636632002404020 in words is "six hundred thirty-six trillion, six hundred thirty-two billion, two million, four hundred four thousand, twenty".