6515278530 has 16 divisors (see below), whose sum is σ = 15636668544. Its totient is φ = 1737407600.

The previous prime is 6515278529. The next prime is 6515278537. The reversal of 6515278530 is 358725156.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6515278537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108587946 + ... + 108588005.

It is an arithmetic number, because the mean of its divisors is an integer number (977291784).

Almost surely, 2^6515278530 is an apocalyptic number.

6515278530 is an abundant number, since it is smaller than the sum of its proper divisors (9121390014).

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

6515278530 is a wasteful number, since it uses less digits than its factorization.

6515278530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217175961.

The product of its (nonzero) digits is 252000, while the sum is 42.

The square root of 6515278530 is about 80717.2752885031. The cubic root of 6515278530 is about 1867.7166722611.

The spelling of 6515278530 in words is "six billion, five hundred fifteen million, two hundred seventy-eight thousand, five hundred thirty".