636220472512 has 28 divisors (see below), whose sum is σ = 1266559525296. Its totient is φ = 317087363840.

The previous prime is 636220472477. The next prime is 636220472539. The reversal of 636220472512 is 215274022636.

It is a happy number.

It is an unprimeable number.

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, 15962323 + ... + 16002130.

Almost surely, 2^636220472512 is an apocalyptic number.

It is an amenable number.

636220472512 is a deficient number, since it is larger than the sum of its proper divisors (630339052784).

636220472512 is a wasteful number, since it uses less digits than its factorization.

636220472512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31964776 (or 31964766 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 636220472512 in words is "six hundred thirty-six billion, two hundred twenty million, four hundred seventy-two thousand, five hundred twelve".