6523506543 has 12 divisors (see below), whose sum is σ = 9239754440. Its totient is φ = 4093180032.

The previous prime is 6523506541. The next prime is 6523506547. The reversal of 6523506543 is 3456053256.

It is not a de Polignac number, because 6523506543 - 2¹ = 6523506541 is a prime.

It is a super-2 number, since 2×6523506543² = 85112275233127621698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6523506541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3761248 + ... + 3762981.

Almost surely, 2^6523506543 is an apocalyptic number.

6523506543 is a deficient number, since it is larger than the sum of its proper divisors (2716247897).

6523506543 is a wasteful number, since it uses less digits than its factorization.

6523506543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7524266 (or 7524249 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 39.

The square root of 6523506543 is about 80768.2273112392. The cubic root of 6523506543 is about 1868.5025753442.

Adding to 6523506543 its reverse (3456053256), we get a palindrome (9979559799).

The spelling of 6523506543 in words is "six billion, five hundred twenty-three million, five hundred six thousand, five hundred forty-three".