6636402520012 has 12 divisors (see below), whose sum is σ = 11674509146496. Its totient is φ = 3300828478160.

The previous prime is 6636402520009. The next prime is 6636402520037. The reversal of 6636402520012 is 2100252046366.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4343194603 + ... + 4343196130.

It is an arithmetic number, because the mean of its divisors is an integer number (972875762208).

Almost surely, 2^{6636402520012} is an apocalyptic number.

It is an amenable number.

6636402520012 is a deficient number, since it is larger than the sum of its proper divisors (5038106626484).

6636402520012 is a wasteful number, since it uses less digits than its factorization.

6636402520012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8686390928 (or 8686390926 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 6636402520012 its reverse (2100252046366), we get a palindrome (8736654566378).

The spelling of 6636402520012 in words is "six trillion, six hundred thirty-six billion, four hundred two million, five hundred twenty thousand, twelve".