11718744818173 has 2 divisors, whose sum is σ = 11718744818174. Its totient is φ = 11718744818172.

The previous prime is 11718744818147. The next prime is 11718744818201. The reversal of 11718744818173 is 37181844781711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9826739066169 + 1892005752004 = 3134763^2 + 1375502^2 .

It is a cyclic number.

It is not a de Polignac number, because 11718744818173 - 2⁴¹ = 9519721562621 is a prime.

It is a super-2 number, since 2×11718744818173² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11710744818173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5859372409086 + 5859372409087.

It is an arithmetic number, because the mean of its divisors is an integer number (5859372409087).

Almost surely, 2^{11718744818173} is an apocalyptic number.

It is an amenable number.

11718744818173 is a deficient number, since it is larger than the sum of its proper divisors (1).

11718744818173 is an equidigital number, since it uses as much as digits as its factorization.

11718744818173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8429568, while the sum is 61.

The spelling of 11718744818173 in words is "eleven trillion, seven hundred eighteen billion, seven hundred forty-four million, eight hundred eighteen thousand, one hundred seventy-three".