6440650305 has 32 divisors (see below), whose sum is σ = 10851978240. Its totient is φ = 3252853440.

The previous prime is 6440650253. The next prime is 6440650313. The reversal of 6440650305 is 5030560446.

It is not a de Polignac number, because 6440650305 - 2¹² = 6440646209 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1303690 + ... + 1308620.

It is an arithmetic number, because the mean of its divisors is an integer number (339124320).

Almost surely, 2^6440650305 is an apocalyptic number.

It is an amenable number.

6440650305 is a deficient number, since it is larger than the sum of its proper divisors (4411327935).

6440650305 is a wasteful number, since it uses less digits than its factorization.

6440650305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9541.

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 6440650305 is about 80253.6622528841. The cubic root of 6440650305 is about 1860.5581152635.

The spelling of 6440650305 in words is "six billion, four hundred forty million, six hundred fifty thousand, three hundred five".