116560166561 has 4 divisors (see below), whose sum is σ = 117112584624. Its totient is φ = 116007748500.

The previous prime is 116560166543. The next prime is 116560166621. The reversal of 116560166561 is 165661065611.

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, and also an emirpimes, since its reverse is a distinct semiprime: 165661065611 = 157 ⋅1055166023.

It is a cyclic number.

It is not a de Polignac number, because 116560166561 - 2¹⁴ = 116560150177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116560066561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276208715 + ... + 276209136.

It is an arithmetic number, because the mean of its divisors is an integer number (29278146156).

Almost surely, 2^116560166561 is an apocalyptic number.

It is an amenable number.

116560166561 is a deficient number, since it is larger than the sum of its proper divisors (552418063).

116560166561 is an equidigital number, since it uses as much as digits as its factorization.

116560166561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552418062.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 116560166561 in words is "one hundred sixteen billion, five hundred sixty million, one hundred sixty-six thousand, five hundred sixty-one".