1818201100069 has 2 divisors, whose sum is σ = 1818201100070. Its totient is φ = 1818201100068.

The previous prime is 1818201100063. The next prime is 1818201100099. The reversal of 1818201100069 is 9600011028181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1577380259844 + 240820840225 = 1255938^2 + 490735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1818201100069 - 2²⁵ = 1818167545637 is a prime.

It is a super-2 number, since 2×1818201100069² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1818201100063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909100550034 + 909100550035.

It is an arithmetic number, because the mean of its divisors is an integer number (909100550035).

Almost surely, 2^{1818201100069} is an apocalyptic number.

It is an amenable number.

1818201100069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818201100069 is an equidigital number, since it uses as much as digits as its factorization.

1818201100069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 37.

The spelling of 1818201100069 in words is "one trillion, eight hundred eighteen billion, two hundred one million, one hundred thousand, sixty-nine".