6520405130 has 16 divisors (see below), whose sum is σ = 11750344704. Its totient is φ = 2605136400.

The previous prime is 6520405109. The next prime is 6520405139. The reversal of 6520405130 is 315040256.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6520405130.

It is not an unprimeable number, because it can be changed into a prime (6520405139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369146 + ... + 386405.

It is an arithmetic number, because the mean of its divisors is an integer number (734396544).

Almost surely, 2^6520405130 is an apocalyptic number.

6520405130 is a deficient number, since it is larger than the sum of its proper divisors (5229939574).

6520405130 is a wasteful number, since it uses less digits than its factorization.

6520405130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756421.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 6520405130 is about 80749.0255668760. The cubic root of 6520405130 is about 1868.2064198570.

Adding to 6520405130 its reverse (315040256), we get a palindrome (6835445386).

The spelling of 6520405130 in words is "six billion, five hundred twenty million, four hundred five thousand, one hundred thirty".