6520505361 has 4 divisors (see below), whose sum is σ = 8694007152. Its totient is φ = 4347003572.

The previous prime is 6520505351. The next prime is 6520505389. The reversal of 6520505361 is 1635050256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6520505361 - 2⁶ = 6520505297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6520505351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1086750891 + ... + 1086750896.

It is an arithmetic number, because the mean of its divisors is an integer number (2173501788).

Almost surely, 2^6520505361 is an apocalyptic number.

It is an amenable number.

6520505361 is a deficient number, since it is larger than the sum of its proper divisors (2173501791).

6520505361 is a wasteful number, since it uses less digits than its factorization.

6520505361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173501790.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 6520505361 is about 80749.6461973673. The cubic root of 6520505361 is about 1868.2159924339.

The spelling of 6520505361 in words is "six billion, five hundred twenty million, five hundred five thousand, three hundred sixty-one".