115811054857 has 2 divisors, whose sum is σ = 115811054858. Its totient is φ = 115811054856.

The previous prime is 115811054839. The next prime is 115811054873. The reversal of 115811054857 is 758450118511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73538050041 + 42273004816 = 271179^2 + 205604^2 .

It is an emirp because it is prime and its reverse (758450118511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115811054857 - 2¹⁹ = 115810530569 is a prime.

It is not a weakly prime, because it can be changed into another prime (115811051857) 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 as a sum of consecutive naturals, namely, 57905527428 + 57905527429.

It is an arithmetic number, because the mean of its divisors is an integer number (57905527429).

Almost surely, 2^115811054857 is an apocalyptic number.

It is an amenable number.

115811054857 is a deficient number, since it is larger than the sum of its proper divisors (1).

115811054857 is an equidigital number, since it uses as much as digits as its factorization.

115811054857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224000, while the sum is 46.

The spelling of 115811054857 in words is "one hundred fifteen billion, eight hundred eleven million, fifty-four thousand, eight hundred fifty-seven".