6561036804 has 48 divisors (see below), whose sum is σ = 17562682368. Its totient is φ = 1867447968.

The previous prime is 6561036761. The next prime is 6561036817. The reversal of 6561036804 is 4086301656.

It is an unprimeable number.

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, 126402 + ... + 170585.

It is an arithmetic number, because the mean of its divisors is an integer number (365889216).

Almost surely, 2^6561036804 is an apocalyptic number.

It is an amenable number.

6561036804 is an abundant number, since it is smaller than the sum of its proper divisors (11001645564).

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

6561036804 is a wasteful number, since it uses less digits than its factorization.

6561036804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297264 (or 297262 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 6561036804 is about 81000.2271848666. The cubic root of 6561036804 is about 1872.0789412159.

The spelling of 6561036804 in words is "six billion, five hundred sixty-one million, thirty-six thousand, eight hundred four".