6528740401 has 4 divisors (see below), whose sum is σ = 6912783972. Its totient is φ = 6144696832.

The previous prime is 6528740389. The next prime is 6528740431. The reversal of 6528740401 is 1040478256.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2943605025 + 3585135376 = 54255^2 + 59876^2 .

It is a cyclic number.

It is not a de Polignac number, because 6528740401 - 2¹³ = 6528732209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6528740431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192021760 + ... + 192021793.

It is an arithmetic number, because the mean of its divisors is an integer number (1728195993).

Almost surely, 2^6528740401 is an apocalyptic number.

It is an amenable number.

6528740401 is a deficient number, since it is larger than the sum of its proper divisors (384043571).

6528740401 is a wasteful number, since it uses less digits than its factorization.

6528740401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384043570.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 6528740401 is about 80800.6212909282. The cubic root of 6528740401 is about 1869.0021462866.

The spelling of 6528740401 in words is "six billion, five hundred twenty-eight million, seven hundred forty thousand, four hundred one".