1818350169697 has 12 divisors (see below), whose sum is σ = 1929679856148. Its totient is φ = 1712134389600.

The previous prime is 1818350169689. The next prime is 1818350169703. The reversal of 1818350169697 is 7969610538181.

It can be written as a sum of positive squares in 2 ways, for example, as 1158731685136 + 659618484561 = 1076444^2 + 812169^2 .

It is not a de Polignac number, because 1818350169697 - 2³ = 1818350169689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1818350169497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25533954 + ... + 25605067.

It is an arithmetic number, because the mean of its divisors is an integer number (160806654679).

Almost surely, 2^{1818350169697} is an apocalyptic number.

It is an amenable number.

1818350169697 is a deficient number, since it is larger than the sum of its proper divisors (111329686451).

1818350169697 is an equidigital number, since it uses as much as digits as its factorization.

1818350169697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51139120 (or 51139089 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 64.

The spelling of 1818350169697 in words is "one trillion, eight hundred eighteen billion, three hundred fifty million, one hundred sixty-nine thousand, six hundred ninety-seven".