6520454365 has 4 divisors (see below), whose sum is σ = 7824545244. Its totient is φ = 5216363488.

The previous prime is 6520454359. The next prime is 6520454377. The reversal of 6520454365 is 5634540256.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3654565209 + 2865889156 = 60453^2 + 53534^2 .

It is a cyclic number.

It is not a de Polignac number, because 6520454365 - 2¹⁹ = 6519930077 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652045432 + ... + 652045441.

It is an arithmetic number, because the mean of its divisors is an integer number (1956136311).

Almost surely, 2^6520454365 is an apocalyptic number.

It is an amenable number.

6520454365 is a deficient number, since it is larger than the sum of its proper divisors (1304090879).

6520454365 is a wasteful number, since it uses less digits than its factorization.

6520454365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304090878.

The product of its (nonzero) digits is 432000, while the sum is 40.

The square root of 6520454365 is about 80749.3304306605. The cubic root of 6520454365 is about 1868.2111220654.

The spelling of 6520454365 in words is "six billion, five hundred twenty million, four hundred fifty-four thousand, three hundred sixty-five".