115581845901281 has 2 divisors, whose sum is σ = 115581845901282. Its totient is φ = 115581845901280.

The previous prime is 115581845901239. The next prime is 115581845901337. The reversal of 115581845901281 is 182109548185511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92226904938256 + 23354940963025 = 9603484^2 + 4832695^2 .

It is a cyclic number.

It is not a de Polignac number, because 115581845901281 - 2¹⁸ = 115581845639137 is a prime.

It is a super-2 number, since 2×115581845901281² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 115581845901281.

It is not a weakly prime, because it can be changed into another prime (115581845301281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57790922950640 + 57790922950641.

It is an arithmetic number, because the mean of its divisors is an integer number (57790922950641).

Almost surely, 2^{115581845901281} is an apocalyptic number.

It is an amenable number.

115581845901281 is a deficient number, since it is larger than the sum of its proper divisors (1).

115581845901281 is an equidigital number, since it uses as much as digits as its factorization.

115581845901281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608000, while the sum is 59.

The spelling of 115581845901281 in words is "one hundred fifteen trillion, five hundred eighty-one billion, eight hundred forty-five million, nine hundred one thousand, two hundred eighty-one".