6404565632 has 16 divisors (see below), whose sum is σ = 12759095850. Its totient is φ = 3202282752.

The previous prime is 6404565613. The next prime is 6404565667. The reversal of 6404565632 is 2365654046.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4869806656 + 1534758976 = 69784^2 + 39176^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 6404565632.

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 as a sum of consecutive naturals, namely, 25017707 + ... + 25017962.

Almost surely, 2^6404565632 is an apocalyptic number.

It is an amenable number.

6404565632 is a deficient number, since it is larger than the sum of its proper divisors (6354530218).

6404565632 is an equidigital number, since it uses as much as digits as its factorization.

6404565632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50035683 (or 50035671 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 41.

The square root of 6404565632 is about 80028.5301127042. The cubic root of 6404565632 is about 1857.0769240543.

The spelling of 6404565632 in words is "six billion, four hundred four million, five hundred sixty-five thousand, six hundred thirty-two".