6540554064 has 80 divisors (see below), whose sum is σ = 18556401600. Its totient is φ = 1968660480.

The previous prime is 6540554057. The next prime is 6540554077. The reversal of 6540554064 is 4604550456.

It is a congruent number.

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, 37104 + ... + 120240.

It is an arithmetic number, because the mean of its divisors is an integer number (231955020).

Almost surely, 2^6540554064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6540554064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9278200800).

6540554064 is an abundant number, since it is smaller than the sum of its proper divisors (12015847536).

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

6540554064 is a wasteful number, since it uses less digits than its factorization.

6540554064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83308 (or 83302 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

The square root of 6540554064 is about 80873.6920388825. The cubic root of 6540554064 is about 1870.1287779617.

The spelling of 6540554064 in words is "six billion, five hundred forty million, five hundred fifty-four thousand, sixty-four".