6403943954 has 8 divisors (see below), whose sum is σ = 9647143740. Its totient is φ = 3188229376.

The previous prime is 6403943929. The next prime is 6403943999. The reversal of 6403943954 is 4593493046.

It can be written as a sum of positive squares in 2 ways, for example, as 5624250025 + 779693929 = 74995^2 + 27923^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 6403943899 and 6403943908.

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, 6870719 + ... + 6871650.

Almost surely, 2^6403943954 is an apocalyptic number.

6403943954 is a deficient number, since it is larger than the sum of its proper divisors (3243199786).

6403943954 is a wasteful number, since it uses less digits than its factorization.

6403943954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13742604.

The product of its (nonzero) digits is 1399680, while the sum is 47.

The square root of 6403943954 is about 80024.6459161176. The cubic root of 6403943954 is about 1857.0168345654.

The spelling of 6403943954 in words is "six billion, four hundred three million, nine hundred forty-three thousand, nine hundred fifty-four".