6504663121 has 8 divisors (see below), whose sum is σ = 7097025600. Its totient is φ = 5912472240.

The previous prime is 6504663073. The next prime is 6504663149. The reversal of 6504663121 is 1213664056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6504663121 - 2¹⁷ = 6504532049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6504667121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44035 + ... + 122263.

It is an arithmetic number, because the mean of its divisors is an integer number (887128200).

Almost surely, 2^6504663121 is an apocalyptic number.

It is an amenable number.

6504663121 is a deficient number, since it is larger than the sum of its proper divisors (592362479).

6504663121 is a wasteful number, since it uses less digits than its factorization.

6504663121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85799.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 6504663121 is about 80651.4917468983. The cubic root of 6504663121 is about 1866.7017576559.

The spelling of 6504663121 in words is "six billion, five hundred four million, six hundred sixty-three thousand, one hundred twenty-one".