6521322408 has 16 divisors (see below), whose sum is σ = 16303306080. Its totient is φ = 2173774128.

The previous prime is 6521322373. The next prime is 6521322413. The reversal of 6521322408 is 8042231256.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135860860 + ... + 135860907.

It is an arithmetic number, because the mean of its divisors is an integer number (1018956630).

Almost surely, 2^6521322408 is an apocalyptic number.

It is an amenable number.

6521322408 is an abundant number, since it is smaller than the sum of its proper divisors (9781983672).

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

6521322408 is a wasteful number, since it uses less digits than its factorization.

6521322408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271721776 (or 271721772 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 6521322408 is about 80754.7051756119. The cubic root of 6521322408 is about 1868.2940209729.

The spelling of 6521322408 in words is "six billion, five hundred twenty-one million, three hundred twenty-two thousand, four hundred eight".