6404728529 has 8 divisors (see below), whose sum is σ = 6797219328. Its totient is φ = 6013986880.

The previous prime is 6404728507. The next prime is 6404728543. The reversal of 6404728529 is 9258274046.

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 6404728529 - 2¹² = 6404724433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6404728579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429737 + ... + 444390.

It is an arithmetic number, because the mean of its divisors is an integer number (849652416).

Almost surely, 2^6404728529 is an apocalyptic number.

It is an amenable number.

6404728529 is a deficient number, since it is larger than the sum of its proper divisors (392490799).

6404728529 is a wasteful number, since it uses less digits than its factorization.

6404728529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874575.

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 6404728529 is about 80029.5478495287. The cubic root of 6404728529 is about 1857.0926685358.

The spelling of 6404728529 in words is "six billion, four hundred four million, seven hundred twenty-eight thousand, five hundred twenty-nine".