6540722808 has 16 divisors (see below), whose sum is σ = 16351807080. Its totient is φ = 2180240928.

The previous prime is 6540722803. The next prime is 6540722809. The reversal of 6540722808 is 8082270456.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6540722808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540722803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136265035 + ... + 136265082.

Almost surely, 2^6540722808 is an apocalyptic number.

It is an amenable number.

6540722808 is an abundant number, since it is smaller than the sum of its proper divisors (9811084272).

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

6540722808 is a wasteful number, since it uses less digits than its factorization.

6540722808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272530126 (or 272530122 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 6540722808 is about 80874.7352885931. The cubic root of 6540722808 is about 1870.1448607122.

The spelling of 6540722808 in words is "six billion, five hundred forty million, seven hundred twenty-two thousand, eight hundred eight".