6542537540 has 48 divisors (see below), whose sum is σ = 17129556864. Its totient is φ = 2039232000.

The previous prime is 6542537503. The next prime is 6542537581. The reversal of 6542537540 is 457352456.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2122661 + ... + 2125740.

It is an arithmetic number, because the mean of its divisors is an integer number (356865768).

Almost surely, 2^6542537540 is an apocalyptic number.

It is an amenable number.

6542537540 is an abundant number, since it is smaller than the sum of its proper divisors (10587019324).

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

6542537540 is a wasteful number, since it uses less digits than its factorization.

6542537540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248428 (or 4248426 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 41.

The square root of 6542537540 is about 80885.9539104287. The cubic root of 6542537540 is about 1870.3178027554.

Adding to 6542537540 its reverse (457352456), we get a palindrome (6999889996).

The spelling of 6542537540 in words is "six billion, five hundred forty-two million, five hundred thirty-seven thousand, five hundred forty".