6540515208 has 64 divisors (see below), whose sum is σ = 18177868800. Its totient is φ = 2178999360.

The previous prime is 6540515171. The next prime is 6540515251. The reversal of 6540515208 is 8025150456.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 455385 + ... + 469527.

It is an arithmetic number, because the mean of its divisors is an integer number (284029200).

Almost surely, 2^6540515208 is an apocalyptic number.

It is an amenable number.

6540515208 is an abundant number, since it is smaller than the sum of its proper divisors (11637353592).

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

6540515208 is a wasteful number, since it uses less digits than its factorization.

6540515208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16299 (or 16289 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 6540515208 is about 80873.4518120749. The cubic root of 6540515208 is about 1870.1250746125.

The spelling of 6540515208 in words is "six billion, five hundred forty million, five hundred fifteen thousand, two hundred eight".