6561003012 has 24 divisors (see below), whose sum is σ = 16114744800. Its totient is φ = 2071895616.

The previous prime is 6561002999. The next prime is 6561003017. The reversal of 6561003012 is 2103001656.

It is not an unprimeable number, because it can be changed into a prime (6561003017) 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 7 ways as a sum of consecutive naturals, for example, 14387937 + ... + 14388392.

It is an arithmetic number, because the mean of its divisors is an integer number (671447700).

Almost surely, 2^6561003012 is an apocalyptic number.

It is an amenable number.

6561003012 is an abundant number, since it is smaller than the sum of its proper divisors (9553741788).

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

6561003012 is a wasteful number, since it uses less digits than its factorization.

6561003012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28776355 (or 28776353 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 6561003012 is about 81000.0185925905. The cubic root of 6561003012 is about 1872.0757272219.

Adding to 6561003012 its reverse (2103001656), we get a palindrome (8664004668).

The spelling of 6561003012 in words is "six billion, five hundred sixty-one million, three thousand, twelve".