1105318721777 has 2 divisors, whose sum is σ = 1105318721778. Its totient is φ = 1105318721776.

The previous prime is 1105318721719. The next prime is 1105318721783. The reversal of 1105318721777 is 7771278135011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1004306626801 + 101012094976 = 1002151^2 + 317824^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105318721777 - 2¹⁸ = 1105318459633 is a prime.

It is a super-2 number, since 2×1105318721777² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1105318726777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552659360888 + 552659360889.

It is an arithmetic number, because the mean of its divisors is an integer number (552659360889).

Almost surely, 2^{1105318721777} is an apocalyptic number.

It is an amenable number.

1105318721777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105318721777 is an equidigital number, since it uses as much as digits as its factorization.

1105318721777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576240, while the sum is 50.

The spelling of 1105318721777 in words is "one trillion, one hundred five billion, three hundred eighteen million, seven hundred twenty-one thousand, seven hundred seventy-seven".