6504905641728 has 72 divisors (see below), whose sum is σ = 18644268843088. Its totient is φ = 2001509425152.

The previous prime is 6504905641711. The next prime is 6504905641739. The reversal of 6504905641728 is 8271465094056.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 325756525 + ... + 325776492.

Almost surely, 2^{6504905641728} is an apocalyptic number.

It is an amenable number.

6504905641728 is an abundant number, since it is smaller than the sum of its proper divisors (12139363201360).

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

6504905641728 is a wasteful number, since it uses less digits than its factorization.

6504905641728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651533049 (or 651533035 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 57.

The spelling of 6504905641728 in words is "six trillion, five hundred four billion, nine hundred five million, six hundred forty-one thousand, seven hundred twenty-eight".