6539838520 has 16 divisors (see below), whose sum is σ = 14714636760. Its totient is φ = 2615935392.

The previous prime is 6539838509. The next prime is 6539838521. The reversal of 6539838520 is 258389356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6539838521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81747942 + ... + 81748021.

Almost surely, 2^6539838520 is an apocalyptic number.

It is an amenable number.

6539838520 is an abundant number, since it is smaller than the sum of its proper divisors (8174798240).

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

6539838520 is a wasteful number, since it uses less digits than its factorization.

6539838520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163495974 (or 163495970 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The square root of 6539838520 is about 80869.2680812681. The cubic root of 6539838520 is about 1870.0605774079.

The spelling of 6539838520 in words is "six billion, five hundred thirty-nine million, eight hundred thirty-eight thousand, five hundred twenty".