115711843081 has 2 divisors, whose sum is σ = 115711843082. Its totient is φ = 115711843080.

The previous prime is 115711843073. The next prime is 115711843097. The reversal of 115711843081 is 180348117511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73300147600 + 42411695481 = 270740^2 + 205941^2 .

It is an emirp because it is prime and its reverse (180348117511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115711843081 - 2³ = 115711843073 is a prime.

It is a super-2 number, since 2×115711843081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (115711843021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57855921540 + 57855921541.

It is an arithmetic number, because the mean of its divisors is an integer number (57855921541).

Almost surely, 2^115711843081 is an apocalyptic number.

It is an amenable number.

115711843081 is a deficient number, since it is larger than the sum of its proper divisors (1).

115711843081 is an equidigital number, since it uses as much as digits as its factorization.

115711843081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 40.

The spelling of 115711843081 in words is "one hundred fifteen billion, seven hundred eleven million, eight hundred forty-three thousand, eighty-one".