6520451161 has 4 divisors (see below), whose sum is σ = 7451944192. Its totient is φ = 5588958132.

The previous prime is 6520451159. The next prime is 6520451173. The reversal of 6520451161 is 1611540256.

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 6520451161 - 2¹ = 6520451159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6520451111) 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, 465746505 + ... + 465746518.

It is an arithmetic number, because the mean of its divisors is an integer number (1862986048).

Almost surely, 2^6520451161 is an apocalyptic number.

It is an amenable number.

6520451161 is a deficient number, since it is larger than the sum of its proper divisors (931493031).

6520451161 is an equidigital number, since it uses as much as digits as its factorization.

6520451161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931493030.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 6520451161 is about 80749.3105914843. The cubic root of 6520451161 is about 1868.2108160668.

The spelling of 6520451161 in words is "six billion, five hundred twenty million, four hundred fifty-one thousand, one hundred sixty-one".