6520063601 has 4 divisors (see below), whose sum is σ = 6903596772. Its totient is φ = 6136530432.

The previous prime is 6520063577. The next prime is 6520063607. The reversal of 6520063601 is 1063600256.

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 3510444001 + 3009619600 = 59249^2 + 54860^2 .

It is a cyclic number.

It is not a de Polignac number, because 6520063601 - 2²⁶ = 6452954737 is a prime.

It is a super-2 number, since 2×6520063601² = 85022458722170174402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6520063607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191766560 + ... + 191766593.

It is an arithmetic number, because the mean of its divisors is an integer number (1725899193).

Almost surely, 2^6520063601 is an apocalyptic number.

It is an amenable number.

6520063601 is a deficient number, since it is larger than the sum of its proper divisors (383533171).

6520063601 is a wasteful number, since it uses less digits than its factorization.

6520063601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383533170.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 6520063601 is about 80746.9107830139. The cubic root of 6520063601 is about 1868.1738013414.

Adding to 6520063601 its reverse (1063600256), we get a palindrome (7583663857).

The spelling of 6520063601 in words is "six billion, five hundred twenty million, sixty-three thousand, six hundred one".