6416408643 has 4 divisors (see below), whose sum is σ = 8555211528. Its totient is φ = 4277605760.

The previous prime is 6416408573. The next prime is 6416408731. The reversal of 6416408643 is 3468046146.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6416408643 - 2⁸ = 6416408387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6416408595 and 6416408604.

It is not an unprimeable number, because it can be changed into a prime (6412408643) 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, 1069401438 + ... + 1069401443.

It is an arithmetic number, because the mean of its divisors is an integer number (2138802882).

Almost surely, 2^6416408643 is an apocalyptic number.

6416408643 is a deficient number, since it is larger than the sum of its proper divisors (2138802885).

6416408643 is a wasteful number, since it uses less digits than its factorization.

6416408643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138802884.

The product of its (nonzero) digits is 331776, while the sum is 42.

The square root of 6416408643 is about 80102.4883695881. The cubic root of 6416408643 is about 1858.2208913035.

The spelling of 6416408643 in words is "six billion, four hundred sixteen million, four hundred eight thousand, six hundred forty-three".