6541990328 has 32 divisors (see below), whose sum is σ = 12543984000. Its totient is φ = 3197549280.

The previous prime is 6541990327. The next prime is 6541990369. The reversal of 6541990328 is 8230991456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6541990321) 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 7 ways as a sum of consecutive naturals, for example, 45773 + ... + 123203.

It is an arithmetic number, because the mean of its divisors is an integer number (391999500).

Almost surely, 2^6541990328 is an apocalyptic number.

It is an amenable number.

6541990328 is a deficient number, since it is larger than the sum of its proper divisors (6001993672).

6541990328 is a wasteful number, since it uses less digits than its factorization.

6541990328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77675 (or 77671 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 6541990328 is about 80882.5712252028. The cubic root of 6541990328 is about 1870.2656573977.

The spelling of 6541990328 in words is "six billion, five hundred forty-one million, nine hundred ninety thousand, three hundred twenty-eight".