6438530658 has 32 divisors (see below), whose sum is σ = 15029766144. Its totient is φ = 1800439632.

The previous prime is 6438530641. The next prime is 6438530669. The reversal of 6438530658 is 8560358346.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1628860 + ... + 1632807.

It is an arithmetic number, because the mean of its divisors is an integer number (469680192).

Almost surely, 2^6438530658 is an apocalyptic number.

6438530658 is an abundant number, since it is smaller than the sum of its proper divisors (8591235486).

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

6438530658 is a wasteful number, since it uses less digits than its factorization.

6438530658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261726.

The product of its (nonzero) digits is 2073600, while the sum is 48.

The square root of 6438530658 is about 80240.4552454683. The cubic root of 6438530658 is about 1860.3539868525.

The spelling of 6438530658 in words is "six billion, four hundred thirty-eight million, five hundred thirty thousand, six hundred fifty-eight".