6400000445 has 8 divisors (see below), whose sum is σ = 7887568344. Its totient is φ = 4981621824.

The previous prime is 6400000433. The next prime is 6400000457. The reversal of 6400000445 is 5440000046.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6400000433) and next prime (6400000457).

It can be written as a sum of positive squares in 4 ways, for example, as 460832089 + 5939168356 = 21467^2 + 77066^2 .

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 6400000445 - 2⁶ = 6400000381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6400000445.

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, 17297114 + ... + 17297483.

It is an arithmetic number, because the mean of its divisors is an integer number (985946043).

Almost surely, 2^6400000445 is an apocalyptic number.

It is an amenable number.

6400000445 is a deficient number, since it is larger than the sum of its proper divisors (1487567899).

6400000445 is a wasteful number, since it uses less digits than its factorization.

6400000445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34594639.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 6400000445 is about 80000.0027812500. The cubic root of 6400000445 is about 1856.6355764765.

The spelling of 6400000445 in words is "six billion, four hundred million, four hundred forty-five", and thus it is an aban number.