4431065646 has 32 divisors (see below), whose sum is σ = 10154631168. Its totient is φ = 1262708640.

The previous prime is 4431065641. The next prime is 4431065707. The reversal of 4431065646 is 6465601344.

It is a super-2 number, since 2×4431065646² = 39268685518322794632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4431065641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121645 + ... + 153816.

It is an arithmetic number, because the mean of its divisors is an integer number (317332224).

Almost surely, 2^4431065646 is an apocalyptic number.

4431065646 is an abundant number, since it is smaller than the sum of its proper divisors (5723565522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4431065646 is a wasteful number, since it uses less digits than its factorization.

4431065646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275856.

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 4431065646 is about 66566.2500521097. The cubic root of 4431065646 is about 1642.4899770267.

The spelling of 4431065646 in words is "four billion, four hundred thirty-one million, sixty-five thousand, six hundred forty-six".