6520063603 has 4 divisors (see below), whose sum is σ = 6520506048. Its totient is φ = 6519621160.

The previous prime is 6520063577. The next prime is 6520063607. The reversal of 6520063603 is 3063600256.

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

It is a cyclic number.

It is not a de Polignac number, because 6520063603 - 2²¹ = 6517966451 is a prime.

It is a super-2 number, since 2×6520063603² = 85022458774330683218, 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198328 + ... + 228853.

It is an arithmetic number, because the mean of its divisors is an integer number (1630126512).

Almost surely, 2^6520063603 is an apocalyptic number.

6520063603 is a deficient number, since it is larger than the sum of its proper divisors (442445).

6520063603 is a wasteful number, since it uses less digits than its factorization.

6520063603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442444.

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 6520063603 is about 80746.9107953982. The cubic root of 6520063603 is about 1868.1738015324.

Adding to 6520063603 its reverse (3063600256), we get a palindrome (9583663859).

The spelling of 6520063603 in words is "six billion, five hundred twenty million, sixty-three thousand, six hundred three".