115555165005109 has 2 divisors, whose sum is σ = 115555165005110. Its totient is φ = 115555165005108.

The previous prime is 115555165005053. The next prime is 115555165005127. The reversal of 115555165005109 is 901500561555511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89531393182609 + 26023771822500 = 9462103^2 + 5101350^2 .

It is a cyclic number.

It is not a de Polignac number, because 115555165005109 - 2¹⁵ = 115555164972341 is a prime.

It is a super-2 number, since 2×115555165005109² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115555165005209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57777582502554 + 57777582502555.

It is an arithmetic number, because the mean of its divisors is an integer number (57777582502555).

Almost surely, 2^{115555165005109} is an apocalyptic number.

It is an amenable number.

115555165005109 is a deficient number, since it is larger than the sum of its proper divisors (1).

115555165005109 is an equidigital number, since it uses as much as digits as its factorization.

115555165005109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 843750, while the sum is 49.

The spelling of 115555165005109 in words is "one hundred fifteen trillion, five hundred fifty-five billion, one hundred sixty-five million, five thousand, one hundred nine".