105659517158581 has 2 divisors, whose sum is σ = 105659517158582. Its totient is φ = 105659517158580.

The previous prime is 105659517158501. The next prime is 105659517158597. The reversal of 105659517158581 is 185851715956501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54967025300625 + 50692491857956 = 7413975^2 + 7119866^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105659517158581 is a prime.

It is a super-2 number, since 2×105659517158581² (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 (105659517158501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52829758579290 + 52829758579291.

It is an arithmetic number, because the mean of its divisors is an integer number (52829758579291).

Almost surely, 2^{105659517158581} is an apocalyptic number.

It is an amenable number.

105659517158581 is a deficient number, since it is larger than the sum of its proper divisors (1).

105659517158581 is an equidigital number, since it uses as much as digits as its factorization.

105659517158581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600000, while the sum is 67.

The spelling of 105659517158581 in words is "one hundred five trillion, six hundred fifty-nine billion, five hundred seventeen million, one hundred fifty-eight thousand, five hundred eighty-one".