6430219856 has 20 divisors (see below), whose sum is σ = 13114264800. Its totient is φ = 3045893472.

The previous prime is 6430219841. The next prime is 6430219879. The reversal of 6430219856 is 6589120346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10575716 + ... + 10576323.

It is an arithmetic number, because the mean of its divisors is an integer number (655713240).

Almost surely, 2^6430219856 is an apocalyptic number.

It is an amenable number.

6430219856 is an abundant number, since it is smaller than the sum of its proper divisors (6684044944).

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

6430219856 is a wasteful number, since it uses less digits than its factorization.

6430219856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21152066 (or 21152060 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 6430219856 is about 80188.6516659309. The cubic root of 6430219856 is about 1859.5531990353.

The spelling of 6430219856 in words is "six billion, four hundred thirty million, two hundred nineteen thousand, eight hundred fifty-six".