18170077117 has 2 divisors, whose sum is σ = 18170077118. Its totient is φ = 18170077116.

The previous prime is 18170077111. The next prime is 18170077129. The reversal of 18170077117 is 71177007181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14363063716 + 3807013401 = 119846^2 + 61701^2 .

It is a cyclic number.

It is not a de Polignac number, because 18170077117 - 2⁷ = 18170076989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18170077117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18170077111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9085038558 + 9085038559.

It is an arithmetic number, because the mean of its divisors is an integer number (9085038559).

Almost surely, 2^18170077117 is an apocalyptic number.

It is an amenable number.

18170077117 is a deficient number, since it is larger than the sum of its proper divisors (1).

18170077117 is an equidigital number, since it uses as much as digits as its factorization.

18170077117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19208, while the sum is 40.

The spelling of 18170077117 in words is "eighteen billion, one hundred seventy million, seventy-seven thousand, one hundred seventeen".