6538328161 has 4 divisors (see below), whose sum is σ = 6541056000. Its totient is φ = 6535600324.

The previous prime is 6538328123. The next prime is 6538328177. The reversal of 6538328161 is 1618238356.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6538328161 - 2⁷ = 6538328033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6538328101) 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 3 ways as a sum of consecutive naturals, for example, 1360321 + ... + 1365118.

It is an arithmetic number, because the mean of its divisors is an integer number (1635264000).

Almost surely, 2^6538328161 is an apocalyptic number.

It is an amenable number.

6538328161 is a deficient number, since it is larger than the sum of its proper divisors (2727839).

6538328161 is a wasteful number, since it uses less digits than its factorization.

6538328161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2727838.

The product of its digits is 207360, while the sum is 43.

The square root of 6538328161 is about 80859.9292666028. The cubic root of 6538328161 is about 1869.9166044195.

The spelling of 6538328161 in words is "six billion, five hundred thirty-eight million, three hundred twenty-eight thousand, one hundred sixty-one".