6443630356 has 12 divisors (see below), whose sum is σ = 11551386420. Its totient is φ = 3143234240.

The previous prime is 6443630353. The next prime is 6443630359. The reversal of 6443630356 is 6530363446.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6443630353) and next prime (6443630359).

It can be written as a sum of positive squares in 2 ways, for example, as 715562500 + 5728067856 = 26750^2 + 75684^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6443630353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19645051 + ... + 19645378.

It is an arithmetic number, because the mean of its divisors is an integer number (962615535).

Almost surely, 2^6443630356 is an apocalyptic number.

It is an amenable number.

6443630356 is a deficient number, since it is larger than the sum of its proper divisors (5107756064).

6443630356 is a wasteful number, since it uses less digits than its factorization.

6443630356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39290474 (or 39290472 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 40.

The square root of 6443630356 is about 80272.2265543943. The cubic root of 6443630356 is about 1860.8450274481.

The spelling of 6443630356 in words is "six billion, four hundred forty-three million, six hundred thirty thousand, three hundred fifty-six".