6561151161 has 8 divisors (see below), whose sum is σ = 8764374144. Its totient is φ = 4366014480.

The previous prime is 6561151153. The next prime is 6561151187. The reversal of 6561151161 is 1611511656.

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

It is not a de Polignac number, because 6561151161 - 2³ = 6561151153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6561151141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2019681 + ... + 2022926.

It is an arithmetic number, because the mean of its divisors is an integer number (1095546768).

Almost surely, 2^6561151161 is an apocalyptic number.

It is an amenable number.

6561151161 is a deficient number, since it is larger than the sum of its proper divisors (2203222983).

6561151161 is a wasteful number, since it uses less digits than its factorization.

6561151161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043151.

The product of its digits is 5400, while the sum is 33.

The square root of 6561151161 is about 81000.9330872182. The cubic root of 6561151161 is about 1872.0898177534.

The spelling of 6561151161 in words is "six billion, five hundred sixty-one million, one hundred fifty-one thousand, one hundred sixty-one".