6561160061 has 16 divisors (see below), whose sum is σ = 6815635200. Its totient is φ = 6312945600.

The previous prime is 6561160037. The next prime is 6561160063. The reversal of 6561160061 is 1600611656.

It is a cyclic number.

It is not a de Polignac number, because 6561160061 - 2²⁶ = 6494051197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561160063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519026 + ... + 531516.

It is an arithmetic number, because the mean of its divisors is an integer number (425977200).

Almost surely, 2^6561160061 is an apocalyptic number.

6561160061 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6561160061 is a deficient number, since it is larger than the sum of its proper divisors (254475139).

6561160061 is a wasteful number, since it uses less digits than its factorization.

6561160061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12740.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 6561160061 is about 81000.9880248383. The cubic root of 6561160061 is about 1872.0906642305.

The spelling of 6561160061 in words is "six billion, five hundred sixty-one million, one hundred sixty thousand, sixty-one".