115705565881 has 4 divisors (see below), whose sum is σ = 115706482164. Its totient is φ = 115704649600.

The previous prime is 115705565863. The next prime is 115705565993. The reversal of 115705565881 is 188565507511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 68141881600 + 47563684281 = 261040^2 + 218091^2 .

It is a cyclic number.

It is not a de Polignac number, because 115705565881 - 2⁵ = 115705565849 is a prime.

It is a super-2 number, since 2×115705565881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115705565281) 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, 231280 + ... + 533761.

It is an arithmetic number, because the mean of its divisors is an integer number (28926620541).

Almost surely, 2^115705565881 is an apocalyptic number.

It is an amenable number.

115705565881 is a deficient number, since it is larger than the sum of its proper divisors (916283).

115705565881 is an equidigital number, since it uses as much as digits as its factorization.

115705565881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916282.

The product of its (nonzero) digits is 1680000, while the sum is 52.

The spelling of 115705565881 in words is "one hundred fifteen billion, seven hundred five million, five hundred sixty-five thousand, eight hundred eighty-one".