6520505297 has 2 divisors, whose sum is σ = 6520505298. Its totient is φ = 6520505296.

The previous prime is 6520505293. The next prime is 6520505323. The reversal of 6520505297 is 7925050256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6323271361 + 197233936 = 79519^2 + 14044^2 .

It is a cyclic number.

It is not a de Polignac number, because 6520505297 - 2² = 6520505293 is a prime.

It is not a weakly prime, because it can be changed into another prime (6520505293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260252648 + 3260252649.

It is an arithmetic number, because the mean of its divisors is an integer number (3260252649).

Almost surely, 2^6520505297 is an apocalyptic number.

It is an amenable number.

6520505297 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520505297 is an equidigital number, since it uses as much as digits as its factorization.

6520505297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 6520505297 is about 80749.6458010808. The cubic root of 6520505297 is about 1868.2159863216.

The spelling of 6520505297 in words is "six billion, five hundred twenty million, five hundred five thousand, two hundred ninety-seven".