6528400657 has 8 divisors (see below), whose sum is σ = 6789718400. Its totient is φ = 6271550064.

The previous prime is 6528400649. The next prime is 6528400667. The reversal of 6528400657 is 7560048256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6528400657 - 2³ = 6528400649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6528400667) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1113807 + ... + 1119652.

It is an arithmetic number, because the mean of its divisors is an integer number (848714800).

Almost surely, 2^6528400657 is an apocalyptic number.

It is an amenable number.

6528400657 is a deficient number, since it is larger than the sum of its proper divisors (261317743).

6528400657 is a wasteful number, since it uses less digits than its factorization.

6528400657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233575.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 6528400657 is about 80798.5189035047. The cubic root of 6528400657 is about 1868.9697258788.

The spelling of 6528400657 in words is "six billion, five hundred twenty-eight million, four hundred thousand, six hundred fifty-seven".