6543524420 has 24 divisors (see below), whose sum is σ = 13811162904. Its totient is φ = 2604121856.

The previous prime is 6543524411. The next prime is 6543524443. The reversal of 6543524420 is 244253456.

It can be written as a sum of positive squares in 4 ways, for example, as 4647966976 + 1895557444 = 68176^2 + 43538^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 826457 + ... + 834336.

It is an arithmetic number, because the mean of its divisors is an integer number (575465121).

Almost surely, 2^6543524420 is an apocalyptic number.

It is an amenable number.

6543524420 is an abundant number, since it is smaller than the sum of its proper divisors (7267638484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6543524420 is a wasteful number, since it uses less digits than its factorization.

6543524420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660999 (or 1660997 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

The square root of 6543524420 is about 80892.0541215267. The cubic root of 6543524420 is about 1870.4118379532.

Adding to 6543524420 its reverse (244253456), we get a palindrome (6787777876).

The spelling of 6543524420 in words is "six billion, five hundred forty-three million, five hundred twenty-four thousand, four hundred twenty".