6541409128 has 16 divisors (see below), whose sum is σ = 12688078500. Its totient is φ = 3157921536.

The previous prime is 6541409087. The next prime is 6541409143. The reversal of 6541409128 is 8219041456.

It can be written as a sum of positive squares in 2 ways, for example, as 6538016164 + 3392964 = 80858^2 + 1842^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14097633 + ... + 14098096.

Almost surely, 2^6541409128 is an apocalyptic number.

It is an amenable number.

6541409128 is a deficient number, since it is larger than the sum of its proper divisors (6146669372).

6541409128 is a wasteful number, since it uses less digits than its factorization.

6541409128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28195764 (or 28195760 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 6541409128 is about 80878.9782823695. The cubic root of 6541409128 is about 1870.2102700442.

The spelling of 6541409128 in words is "six billion, five hundred forty-one million, four hundred nine thousand, one hundred twenty-eight".