6404023445 has 16 divisors (see below), whose sum is σ = 7740965232. Its totient is φ = 5085895680.

The previous prime is 6404023433. The next prime is 6404023499. The reversal of 6404023445 is 5443204046.

It can be written as a sum of positive squares in 8 ways, for example, as 169026001 + 6234997444 = 13001^2 + 78962^2 .

It is not a de Polignac number, because 6404023445 - 2¹⁰ = 6404022421 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 530699 + ... + 542631.

It is an arithmetic number, because the mean of its divisors is an integer number (483810327).

Almost surely, 2^6404023445 is an apocalyptic number.

It is an amenable number.

6404023445 is a deficient number, since it is larger than the sum of its proper divisors (1336941787).

6404023445 is a wasteful number, since it uses less digits than its factorization.

6404023445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12712.

The product of its (nonzero) digits is 46080, while the sum is 32.

The square root of 6404023445 is about 80025.1425803166. The cubic root of 6404023445 is about 1857.0245181385.

The spelling of 6404023445 in words is "six billion, four hundred four million, twenty-three thousand, four hundred forty-five".