6645450012 has 48 divisors (see below), whose sum is σ = 15605581824. Its totient is φ = 2200960000.

The previous prime is 6645449947. The next prime is 6645450017. The reversal of 6645450012 is 2100545466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645450017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3668587 + ... + 3670397.

It is an arithmetic number, because the mean of its divisors is an integer number (325116288).

Almost surely, 2^6645450012 is an apocalyptic number.

It is an amenable number.

6645450012 is an abundant number, since it is smaller than the sum of its proper divisors (8960131812).

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

6645450012 is a wasteful number, since it uses less digits than its factorization.

6645450012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3610 (or 3608 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 6645450012 is about 81519.6296115236. The cubic root of 6645450012 is about 1880.0733723439.

Adding to 6645450012 its reverse (2100545466), we get a palindrome (8745995478).

The spelling of 6645450012 in words is "six billion, six hundred forty-five million, four hundred fifty thousand, twelve".