6520253066565 has 64 divisors (see below), whose sum is σ = 11969639903232. Its totient is φ = 2968967232000.

The previous prime is 6520253066539. The next prime is 6520253066567. The reversal of 6520253066565 is 5656603520256.

It is not a de Polignac number, because 6520253066565 - 2⁵ = 6520253066533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520253066567) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 423357865 + ... + 423373265.

It is an arithmetic number, because the mean of its divisors is an integer number (187025623488).

Almost surely, 2^{6520253066565} is an apocalyptic number.

It is an amenable number.

6520253066565 is a deficient number, since it is larger than the sum of its proper divisors (5449386836667).

6520253066565 is a wasteful number, since it uses less digits than its factorization.

6520253066565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31010.

The product of its (nonzero) digits is 9720000, while the sum is 51.

The spelling of 6520253066565 in words is "six trillion, five hundred twenty billion, two hundred fifty-three million, sixty-six thousand, five hundred sixty-five".