6443556456 has 32 divisors (see below), whose sum is σ = 16181141760. Its totient is φ = 2138218752.

The previous prime is 6443556391. The next prime is 6443556499. The reversal of 6443556456 is 6546553446.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 596625 + ... + 607328.

It is an arithmetic number, because the mean of its divisors is an integer number (505660680).

Almost surely, 2^6443556456 is an apocalyptic number.

It is an amenable number.

6443556456 is an abundant number, since it is smaller than the sum of its proper divisors (9737585304).

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

6443556456 is a wasteful number, since it uses less digits than its factorization.

6443556456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204185 (or 1204181 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 48.

The square root of 6443556456 is about 80271.7662444274. The cubic root of 6443556456 is about 1860.8379136025.

The spelling of 6443556456 in words is "six billion, four hundred forty-three million, five hundred fifty-six thousand, four hundred fifty-six".