6540799218 has 32 divisors (see below), whose sum is σ = 13386772800. Its totient is φ = 2129764416.

The previous prime is 6540799141. The next prime is 6540799241. The reversal of 6540799218 is 8129970456.

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, 27913 + ... + 117731.

It is an arithmetic number, because the mean of its divisors is an integer number (418336650).

Almost surely, 2^6540799218 is an apocalyptic number.

6540799218 is an abundant number, since it is smaller than the sum of its proper divisors (6845973582).

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

6540799218 is a wasteful number, since it uses less digits than its factorization.

6540799218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90106.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 6540799218 is about 80875.2076844319. The cubic root of 6540799218 is about 1870.1521431495.

The spelling of 6540799218 in words is "six billion, five hundred forty million, seven hundred ninety-nine thousand, two hundred eighteen".