6437843659 has 16 divisors (see below), whose sum is σ = 7107674112. Its totient is φ = 5793926688.

The previous prime is 6437843639. The next prime is 6437843683. The reversal of 6437843659 is 9563487346.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6437843659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6437843639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140662 + ... + 180724.

It is an arithmetic number, because the mean of its divisors is an integer number (444229632).

Almost surely, 2^6437843659 is an apocalyptic number.

6437843659 is a deficient number, since it is larger than the sum of its proper divisors (669830453).

6437843659 is a wasteful number, since it uses less digits than its factorization.

6437843659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40386.

The product of its digits is 13063680, while the sum is 55.

The square root of 6437843659 is about 80236.1742545094. The cubic root of 6437843659 is about 1860.2878171596.

The spelling of 6437843659 in words is "six billion, four hundred thirty-seven million, eight hundred forty-three thousand, six hundred fifty-nine".